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SPC is the abbreviation of the process Control for the statistical process control The use of the statistical method to monitor the state of the program, determine the production process under the control state, to reduce the problem of the product quality SPC can solve the problem r 1. Economic: Effective sampling control, without all inspection, adverse rate, can control costs. The process is stable, and the quality, cost and intersection can be grasped. 2. Early warning: The abnormal trend of the process can be discouraged immediately to prevent poor batch to reduce waste. 3. Differential reasons: as a reference for the improvement of the improvement of the system of local issues or the improvement of the management of the system. . Make good use of machinery and equipment: Estimated the capacity of the machine, you can properly arrange proper machines to produce appropriate parts. 5. Improvement assessment: Process capabilities can be used as indicators to improve before and after improvement. Ip using the procedures for controlling the control process 1. Draw the "manufacturing flow chart", and use the characteristics to find out the manufacturing factors (conditions) and quality characteristics of each work channel. 2. Formulate operating standards. 3. Education and training of standards. 4. Perform process ability analysis to determine the limit of control. 5. Formulate a "quality control scheme", including sampling interval, sample size, and the boundaries of control. 6. Formulate procedures such as the research and judgment of the control diagram, the determination and revision of the boundary. 7. Drawing the control diagram for the control of the process. 8. Determine whether the process is in the control state (normal). 9. If there is an abnormal phenomenon, find out the abnormal cause and eliminate it. 10. Modify the operating standards (even specifications or tolerances) if necessary. The analysis of the control drawing is mainly used to analyze the following two points: (1) whether the system (over) procedure analyzed is statistically stable. (2) Whether the process ability index (Process Index) of this process meets the requirements. -The role of control diagram: 1. In terms of quality diagnosis, it can be used to measure the stability of the process, that is, whether the process is in statistical control state; It is used to determine when to adjust the process, and when it is necessary to keep the process stable; 3. In terms of quality improvement, it can be used to confirm whether a process has been improved. The application steps are as follows: 1. Select the quality characteristics of the control diagram to be controlled, such as weight, unqualified number, etc.; 2. Select the type of suitable control graphs; 3. 3. Determine the sample capacity and sampling interval; 4. Collect and record data of at least 20 to 25 samples, or use the data recorded before; 5. Calculate the statistics of each sample, such as the average sample value , Poor samples, sample standard deviations, etc.; 6. Calculate the control boundary of each statistical quantity; 7. Draw the control diagram The ideas other than the control line and the state of despair in the control line and the state of the cause of the abnormal (special) cause; 9. Determine the next action. Cope application control diagram common errors: 1. When the 5M1E factors are not controlled, the process is used in an unstable state, and the control chart management work is used; In the case of CP u003C1, use control chart management work; 3. Use the tolerance line instead of the control line, or use the compressed tolerance line instead of the control line; Do not make an analysis and judgment, and lose the alarm role of the control graph; 5. If you do not play the "point" in time, you cannot find abnormal process in time; Line; 7. The painting method is irregular or incomplete; 8. When studying and analyzing the control diagram, the abnormal point of the abnormal cause has been found. Essence ● Analyze the control diagram When the application control diagram is used, first adjust the non -steady -state process to steady state, and use the analysis control diagram to determine whether the stable state is reached. Determine the process parameters The characteristic: 1. Is the analysis process be statistical control status 2. Is the process ability index that meets the requirements? ● Control the control diagram After adjusting to the steady -state process, the control line of the control diagram is extended as the control diagram. Application process parameter judgment The role of SPC 1. Ensure that the process is continuous and predictable. 2. Improve product quality, production capacity, and reduce costs. 3. Provide the basis for process analysis. 4. Special reasons and general reasons for distinguishing differences, as a guide to take local measures or measures to take measures. 1. The principle of prevention is the core and essence of modern quality management. . The subject of quality management has a very important feature, that is, there must be scientific measures and scientific methods for the principles, guidelines, and goals proposed by quality management to ensure their realization. This reflects the science of quality management disciplines. The scientific methods that ensure the implementation of prevention principles are: SPC (statistical process control) and SPD (statistical process diagnosis). SPC is not used to solve the problem of control graphs used by individual processes. SPC emphasizes the problem from the entire process and the entire system to solve the problem. SPC的重点就在于“P（Process，过程）”rn 产品质量具有变异性rn “人、机、料、法、环” “软（件）、辅（助材料）、 (Water, electricity, steam) public (use facilities) " mutation has statistical laws Random phenomena þ Statistical rules Random phenomenon: may occur under certain conditions or may not occur or not occur if time may not occur or may not occur. Phenomenon. This control and general statistical diagram are different, because it can not only express the value as the curve to observe the trend of its mutation, but also show that the mutation is obsessive or non -opportunity to indicate whether a certain phenomenon is normal And take appropriate measures. This control drawing Decisive policy Based Process analysis Process capabilities to study Process control preparation 不 Tracking abnormal causes Quickly eliminate this cause and study measures to prevent repeating this cause. 原 The general reason refers to the causes of many differences in the process of stable and repeated distribution that causes stable and repeated distribution over time. Or sometimes referred to as "controlled", the general reason is an accidental reason for a stable system. Only when the common cause of the difference is existed and does not change, the output of the process can be predicted. 原 Special reasons: What refers to the cause of the difference in the process of the process, that is, the distribution of the (entire) process when they appear. Unless all special reasons are found out and took measures, they will continue to affect the output of the process in an unpredictable way. If there is a special reason for the difference in the system, the output of the process will be unstable. 部 Local measures Special reasons for eliminating the difference Personal implementation directly related to the process about 15%of process problems r r r r r r 系统 Take measures for the system Generally used to eliminate the general cause of the difference almost always require management measures to correct n 理 Reasonable use of the control diagram Conferry operators who are undergoing process control use can be continuously quality and cost in the process. Make the process reach higher quality lower single items cost higher effective ability to provide a common language for the performance of the discussion process r Special reasons and general reasons for distinguishing differences, as a guide to take local measures or measures to take measures. The role of SPC: 1. Ensure that the process is continuous and predictable. 2. Improve product quality, production capacity, and reduce costs. 3. Provide the basis for process analysis. 4. Special reasons and general reasons for distinguishing differences, as a guide to take local measures or measures to take measures. . The focus of SPC -Process Quality refers to the quality of the product. In other words, it focuses on the "good facts" that the buyers and sellers can jointly judge and appraisal. In the idea of SPC, they hope to put the direction of hard work further on the source of the quality -process. The main source of quality variation due to the fluctuation of the process. 1) Different changes: This factors during the process are not random reasons in the state of statistical management. Because the abnormal factors are not inherent in the process, it is not difficult to remove. Generally, the elimination of abnormal factors on the site can decide to take measures by themselves, and it is not necessary to ask more advanced managers, so it is also called local measures to reduce changes. 2) Occasionally change: The change factor in the process is in the state of statistical management, the characteristics of its products are fixed, that is, the distribution position, distribution and distribution shape. It is inherently difficult to eliminate. To eliminate the accidental factors, the transformation of the entire system such as people, machines, materials, law, and environment must be involved. After investigation and research and making comprehensive feasibility reports, the final section is made by senior leaders, so it is called a systematic measure to reduce changes. Special reasons The intermittent, unpredictable, unstable source of difference. Sometimes it is called the reason for being found. The signal exists is: there is a chain or other non -random situation that exceeds the point of the control line or there is a chain or other non -random situation within the control line. The general cause The cause of difference in the difference, it affects all single values output by the research process; in the control diagram analysis, it manifested as part of the deterioration of the random process. The benefits of the use of the control diagram • For operators who are undergoing process control, the use of • It helps the process to sustain and predict the process in quality and cost r r • Make the process: • higher quality • Lower single -piece cost • higher effective ability • Provide common on the performance of the discussion process. Language • Special reasons and general reasons for distinguishing differences. As a guide to take local measures or measures to take measures In practical applications, when the capacity of each group does not exceed 25% of the positive and negative 25%, 25% At the time, the average sample capacity () is used to calculate the control limit. The control limit determined by the analysis phase under what conditions can be transferred to the control stage: The process capacity can meet production requirements The control diagram is formulated according to the conditions (personnel, equipment, raw materials, process methods, measurement systems, and environment) in accordance with the stable state. If the above conditions change, the control limit must be re -calculated, for example: operator has been trained to increase the operation level significantly; Parameters or new processes; Change the measurement method or measurement instrument; use new raw materials or other raw materials; environmental changes. The test control diagram is applicable after a period of time, whether the control limit is too wide or too narrow, otherwise the data calculation control limit is required; Is when there is a large change in the process capacity, the data needs to be recharged. Calculate control limit. For P, NP diagrams, the process ability is to indicate through the average process of unqualified process. When all points are controlled, the value is calculated. . When the CPK index value is reduced n Control Check Rebate and scrap, In this case, the cost will increase, the quality will be reduced, and the production capacity may be insufficient. MPK index value increases, and bad products decrease. The most important thing is that the product/part is close to our "ideal design value/target", giving customers the greatest satisfaction. Is when the CPK index value starts to reach 1.33 or higher, the inspection work can be reduced, reducing our censorship cost of operation. 原 Multiple reasons Each unit in the process of influence is manifested as random on the control chart does not have a clear pattern but follows one Distribution 由 is composed of all unprecedented small variables usually needs to take system measures to reduce Usually an unpredictable and unstable variant 通 通 通 通 通 or chain or trend beyond the control limit non -random patterns The variable source causes this variant source can be corrected Industrial experience suggestions are: only 15%of the process difference is special. Most (the rest of the 85%) are control drawings that managers can correct the system can distinguish the difference between the general reasons and the special reasons. Measures reduction of general causes. The design of the product or process needs to change the product or process The sound of the control diagram try to fix the general cause of the general cause by continuous adjustment process parameters, called excessive excessive Adjustment, the result will cause a greater process to cause customer satisfaction to decrease to reducing the design by changing the design to reduce the difference in special reasons, which may not solve the problem.图可以给我们提供出出现了哪种类型的变差的线索，供我们采取相应的措施rn 能力指数的计算基于以下假设条件：rn 过程处于统计稳定状态r n Each measuring single value follows the normal distribution The upper and lower limit of the specifications is based on customer requirements The ability to measure the system is sufficient . If the understanding is met to meet these assumptions, the ability is capable, the ability is capable, the ability is capable. The larger the value of the index, the higher the potential customer satisfaction The purpose of the process ability analysis -The design department can refer to the current process capabilities to design the product n -Appropriateness of the appraisal personnel, equipment, materials and working methods -Set the control boundary of the device according to the specifications -determine the most economical operation method R n ◎ Objective: The goal of the process control system is the economic reasonable decision of the influence of the process This to avoid excessive control This concept ○ Determines the general cause of the difference to determine ○ The output of the internal and external customers' happy process and the relationship between the requirements of their . SPC is to use the statistical method: 1. Analyze the output of the process and point out its characteristics. 2. Make the process successfully carry out and maintain the process under statistical control. 3 3 . It systematically reduces the mutation of the main output characteristics of the process. A statistical process control (SPC) This can use statistical control drawings to supervise and control line operations in time. . It can use the statistical calculation process Ability and specifications. . It can prevent the deviation of the process to affect the quality and quality/ reliability of the product. . Determine the logic of to determine whether the process is normal and whether the process should be adopted control system • Payment of questions comparison The answer is more important. . Statistical foundation . The basic principles of SPC 4. The understanding and process control of the process 5. The cause of fluctuations and fluctuations 6. Local measures and system measures r r r . The control of the statistical process 1. Introduction to normal distribution 2. Statistical control status and two errors 3. Process control and process ability 4. Process Improve cycle . Control graph type 1. Control diagram application description . Definition and purpose of control diagram 3. Control chart solution problem ideas 4. 4. Control chart benefits 5. Control diagram classification 6. Selection of control graphs . Steps and calculation methods of establishing calculation control diagrams R n 2. Sepatal and standard deviation diagrams 3. Middle numbers and pole differential charts 4. Single value and mobile polar difference diagram 6. Critical control charts and process ability indexes 1. Process ability interpretation premise 2. Calculation of process ability 3. Process ability index 4. Process performance index
SPC is the abbreviation of Process Control, that is, the statistical process control. In in the process of product production and processing, the size of the product will fluctuate due to some reasons. This fluctuations have a lot of impact on the quality of the product, but it can be used to avoid and eliminate this kind of measures to avoid this. The impact caused by fluctuations, this measure is process control. The implementation of SPC, we need to detect and judge the output of the process, and use graphics and statistics to predict whether the output of the process can meet the customer's requirements. Most companies choose minitab software as basic tools when implementing SPCs.
Statistical process control (SPC for short) is a process control tool with the help of mathematical statistical methods. It analyzes and evaluates the production process, discovers the signs of systemic factors in time according to feedback information, and adopts measures to eliminate its impact, so that the process is maintained in the control state that is affected by random factors to achieve the purpose of controlling quality.
SPC is the abbreviation of proceshen control. Statistical process control (SPC) is an industry standard methodology for measurement, control and quality improvement in the manufacturing process. It will draw the quality parameters that exist in product or other forms in the real -time production process to draw a chart that determines the control limit in advance, thereby helping the enterprise carry out real -time control and analysis of the production process. SPC software tools are a scientific, data -based quality analysis and improvement tool. With its help, the person in charge of the enterprise no longer has to rely on "guessing" quality management. Here, the control limit is determined by the process of production, and the tolerance limit is set according to the needs of customers.
control diagram The data that fluctuates within the control limit indicates that all operations are consistent with expectations, and any fluctuations can be regarded as natural fluctuations that meet the expected during the production process. If the data point falls out of the control limit, it indicates that the production process is abnormal, and the person in charge of the enterprise needs to amend some nodes in the production process to ensure the normal production of production and achieve preventing problems before they occur. In real -time SPC software tools, you can: The abnormal fluctuations and product scrap rates of the production process are greatly reduced. This to improve corporate productivity scientifically. A effective reduction of production costs. The hidden dangers in the process in time. The response to any change in the process. Cope accurate judgment and decision -making at any time at the manufacturing site.
SPC is the abbreviation of the process Control for the statistical process control
The use of the statistical method to monitor the state of the program, determine the production process under the control state, to reduce the problem of the product quality
SPC can solve the problem r
1. Economic: Effective sampling control, without all inspection, adverse rate, can control costs. The process is stable, and the quality, cost and intersection can be grasped.
2. Early warning: The abnormal trend of the process can be discouraged immediately to prevent poor batch to reduce waste.
3. Differential reasons: as a reference for the improvement of the improvement of the system of local issues or the improvement of the management of the system.
. Make good use of machinery and equipment: Estimated the capacity of the machine, you can properly arrange proper machines to produce appropriate parts.
5. Improvement assessment: Process capabilities can be used as indicators to improve before and after improvement.
Ip using the procedures for controlling the control process
1. Draw the "manufacturing flow chart", and use the characteristics to find out the manufacturing factors (conditions) and quality characteristics of each work channel.
2. Formulate operating standards.
3. Education and training of standards.
4. Perform process ability analysis to determine the limit of control.
5. Formulate a "quality control scheme", including sampling interval, sample size, and the boundaries of control.
6. Formulate procedures such as the research and judgment of the control diagram, the determination and revision of the boundary.
7. Drawing the control diagram for the control of the process.
8. Determine whether the process is in the control state (normal).
9. If there is an abnormal phenomenon, find out the abnormal cause and eliminate it.
10. Modify the operating standards (even specifications or tolerances) if necessary.
The analysis of the control drawing is mainly used to analyze the following two points:
(1) whether the system (over) procedure analyzed is statistically stable.
(2) Whether the process ability index (Process Index) of this process meets the requirements.
-The role of control diagram:
1. In terms of quality diagnosis, it can be used to measure the stability of the process, that is, whether the process is in statistical control state; It is used to determine when to adjust the process, and when it is necessary to keep the process stable;
3. In terms of quality improvement, it can be used to confirm whether a process has been improved.
The application steps are as follows:
1. Select the quality characteristics of the control diagram to be controlled, such as weight, unqualified number, etc.;
2. Select the type of suitable control graphs;
3. 3. Determine the sample capacity and sampling interval;
4. Collect and record data of at least 20 to 25 samples, or use the data recorded before;
5. Calculate the statistics of each sample, such as the average sample value , Poor samples, sample standard deviations, etc.;
6. Calculate the control boundary of each statistical quantity;
7. Draw the control diagram The ideas other than the control line and the state of despair in the control line and the state of the cause of the abnormal (special) cause;
9. Determine the next action.
Cope application control diagram common errors:
1. When the 5M1E factors are not controlled, the process is used in an unstable state, and the control chart management work is used; In the case of CP u003C1, use control chart management work;
3. Use the tolerance line instead of the control line, or use the compressed tolerance line instead of the control line; Do not make an analysis and judgment, and lose the alarm role of the control graph;
5. If you do not play the "point" in time, you cannot find abnormal process in time; Line;
7. The painting method is irregular or incomplete;
8. When studying and analyzing the control diagram, the abnormal point of the abnormal cause has been found. Essence
● Analyze the control diagram
When the application control diagram is used, first adjust the non -steady -state process to steady state, and use the analysis control diagram to determine whether the stable state is reached. Determine the process parameters
The characteristic:
1. Is the analysis process be statistical control status
2. Is the process ability index that meets the requirements?
● Control the control diagram
After adjusting to the steady -state process, the control line of the control diagram is extended as the control diagram. Application process parameter judgment
The role of SPC
1. Ensure that the process is continuous and predictable.
2. Improve product quality, production capacity, and reduce costs.
3. Provide the basis for process analysis.
4. Special reasons and general reasons for distinguishing differences, as a guide to take local measures or measures to take measures.
1. The principle of prevention is the core and essence of modern quality management.
. The subject of quality management has a very important feature, that is, there must be scientific measures and scientific methods for the principles, guidelines, and goals proposed by quality management to ensure their realization. This reflects the science of quality management disciplines. The scientific methods that ensure the implementation of prevention principles are: SPC (statistical process control) and SPD (statistical process diagnosis).
SPC is not used to solve the problem of control graphs used by individual processes. SPC emphasizes the problem from the entire process and the entire system to solve the problem. SPC的重点就在于“P（Process，过程）”rn 产品质量具有变异性rn “人、机、料、法、环” “软（件）、辅（助材料）、 (Water, electricity, steam) public (use facilities) "
mutation has statistical laws
Random phenomena þ Statistical rules
Random phenomenon: may occur under certain conditions or may not occur or not occur if time may not occur or may not occur. Phenomenon.
This control and general statistical diagram are different, because it can not only express the value as the curve to observe the trend of its mutation, but also show that the mutation is obsessive or non -opportunity to indicate whether a certain phenomenon is normal And take appropriate measures.
This control drawing
Decisive policy Based
Process analysis
Process capabilities to study
Process control preparation
不 Tracking abnormal causes
Quickly eliminate this cause
and study measures to prevent repeating this cause.
原 The general reason refers to the causes of many differences in the process of stable and repeated distribution that causes stable and repeated distribution over time. Or sometimes referred to as "controlled", the general reason is an accidental reason for a stable system. Only when the common cause of the difference is existed and does not change, the output of the process can be predicted.
原 Special reasons: What refers to the cause of the difference in the process of the process, that is, the distribution of the (entire) process when they appear. Unless all special reasons are found out and took measures, they will continue to affect the output of the process in an unpredictable way. If there is a special reason for the difference in the system, the output of the process will be unstable.
部 Local measures
Special reasons for eliminating the difference
Personal implementation directly related to the process
about 15%of process problems r r r r r r
系统 Take measures for the system
Generally used to eliminate the general cause of the difference
almost always require management measures to correct
n 理 Reasonable use of the control diagram
Conferry operators who are undergoing process control use
can be continuously quality and cost in the process. Make the process reach
higher quality
lower single items cost
higher effective ability
to provide a common language for the performance of the discussion process r
Special reasons and general reasons for distinguishing differences, as a guide to take local measures or measures to take measures.
The role of SPC:
1. Ensure that the process is continuous and predictable.
2. Improve product quality, production capacity, and reduce costs.
3. Provide the basis for process analysis.
4. Special reasons and general reasons for distinguishing differences, as a guide to take local measures or measures to take measures.
. The focus of SPC -Process
Quality refers to the quality of the product. In other words, it focuses on the "good facts" that the buyers and sellers can jointly judge and appraisal. In the idea of SPC, they hope to put the direction of hard work further on the source of the quality -process.
The main source of quality variation due to the fluctuation of the process.
1) Different changes:
This factors during the process are not random reasons in the state of statistical management. Because the abnormal factors are not inherent in the process, it is not difficult to remove. Generally, the elimination of abnormal factors on the site can decide to take measures by themselves, and it is not necessary to ask more advanced managers, so it is also called local measures to reduce changes.
2) Occasionally change:
The change factor in the process is in the state of statistical management, the characteristics of its products are fixed, that is, the distribution position, distribution and distribution shape. It is inherently difficult to eliminate. To eliminate the accidental factors, the transformation of the entire system such as people, machines, materials, law, and environment must be involved. After investigation and research and making comprehensive feasibility reports, the final section is made by senior leaders, so it is called a systematic measure to reduce changes.
Special reasons
The intermittent, unpredictable, unstable source of difference. Sometimes it is called the reason for being found. The signal exists is: there is a chain or other non -random situation that exceeds the point of the control line or there is a chain or other non -random situation within the control line.
The general cause
The cause of difference in the difference, it affects all single values output by the research process; in the control diagram analysis, it manifested as part of the deterioration of the random process.
The benefits of the use of the control diagram
• For operators who are undergoing process control, the use of
• It helps the process to sustain and predict the process in quality and cost r r
• Make the process:
• higher quality
• Lower single -piece cost
• higher effective ability
• Provide common on the performance of the discussion process. Language
• Special reasons and general reasons for distinguishing differences. As a guide to take local measures or measures to take measures
In practical applications, when the capacity of each group does not exceed 25% of the positive and negative 25%, 25% At the time, the average sample capacity () is used to calculate the control limit.
The control limit determined by the analysis phase under what conditions can be transferred to the control stage:
The process capacity can meet production requirements
The control diagram is formulated according to the conditions (personnel, equipment, raw materials, process methods, measurement systems, and environment) in accordance with the stable state. If the above conditions change, the control limit must be re -calculated, for example:
operator has been trained to increase the operation level significantly;
Parameters or new processes;
Change the measurement method or measurement instrument;
use new raw materials or other raw materials;
environmental changes.
The test control diagram is applicable after a period of time, whether the control limit is too wide or too narrow, otherwise the data calculation control limit is required;
Is when there is a large change in the process capacity, the data needs to be recharged. Calculate control limit.
For P, NP diagrams, the process ability is to indicate through the average process of unqualified process. When all points are controlled, the value is calculated.
. When the CPK index value is reduced n Control
Check
Rebate and scrap,
In this case, the cost will increase, the quality will be reduced, and the production capacity may be insufficient.
MPK index value increases, and bad products decrease. The most important thing is that the product/part is close to our "ideal design value/target", giving customers the greatest satisfaction.
Is when the CPK index value starts to reach 1.33 or higher, the inspection work can be reduced, reducing our censorship cost of operation.
原 Multiple reasons
Each unit in the process of influence
is manifested as random on the control chart
does not have a clear pattern
but follows one Distribution
由 is composed of all unprecedented small variables
usually needs to take system measures to reduce
Usually an unpredictable and unstable variant
通 通 通 通 通 or chain or trend beyond the control limit
non -random patterns
The variable source causes this variant source can be corrected
Industrial experience suggestions are:
only 15%of the process difference is special. Most (the rest of the 85%) are
control drawings that managers can correct the system can distinguish the difference between the general reasons and the special reasons. Measures
reduction of general causes. The design of the product or process needs to change the product or process
The sound of the control diagram
try to fix the general cause of the general cause by continuous adjustment process parameters, called excessive excessive Adjustment, the result will cause a greater process to cause customer satisfaction to decrease
to reducing the design by changing the design to reduce the difference in special reasons, which may not solve the problem.图可以给我们提供出出现了哪种类型的变差的线索，供我们采取相应的措施rn 能力指数的计算基于以下假设条件：rn 过程处于统计稳定状态r n Each measuring single value follows the normal distribution
The upper and lower limit of the specifications is based on customer requirements
The ability to measure the system is sufficient
. If the understanding is met to meet these assumptions, the ability is capable, the ability is capable, the ability is capable. The larger the value of the index, the higher the potential customer satisfaction
The purpose of the process ability analysis
-The design department can refer to the current process capabilities to design the product
n -Appropriateness of the appraisal personnel, equipment, materials and working methods
-Set the control boundary of the device according to the specifications
-determine the most economical operation method
R n ◎ Objective: The goal of the process control system is the economic reasonable decision of the influence of the process
This to avoid excessive control
This concept
○ Determines the general cause of the difference to determine
○ The output of the internal and external customers' happy process and the relationship between the requirements of their
.
SPC is to use the statistical method:
1. Analyze the output of the process and point out its characteristics.
2. Make the process successfully carry out and maintain the process under statistical control.
3 3 . It systematically reduces the mutation of the main output characteristics of the process.
A statistical process control (SPC)
This can use statistical control drawings to supervise and control line operations in time.
. It can use the statistical calculation process Ability and specifications.
. It can prevent the deviation of the process to affect the quality and quality/ reliability of the product.
. Determine the logic of
to determine whether the process is normal
and whether the process should be adopted
control system
• Payment of questions comparison The answer is more important. . Statistical foundation
. The basic principles of SPC
4. The understanding and process control of the process
5. The cause of fluctuations and fluctuations
6. Local measures and system measures r r r
. The control of the statistical process
1. Introduction to normal distribution
2. Statistical control status and two errors
3. Process control and process ability
4. Process Improve cycle
. Control graph type
1. Control diagram application description
. Definition and purpose of control diagram
3. Control chart solution problem ideas
4. 4. Control chart benefits
5. Control diagram classification
6. Selection of control graphs
. Steps and calculation methods of establishing calculation control diagrams
R n 2. Sepatal and standard deviation diagrams
3. Middle numbers and pole differential charts
4. Single value and mobile polar difference diagram
6. Critical control charts and process ability indexes
1. Process ability interpretation premise
2. Calculation of process ability
3. Process ability index
4. Process performance index
SPC is the abbreviation of Process Control, that is, the statistical process control.
In in the process of product production and processing, the size of the product will fluctuate due to some reasons. This fluctuations have a lot of impact on the quality of the product, but it can be used to avoid and eliminate this kind of measures to avoid this. The impact caused by fluctuations, this measure is process control.
The implementation of SPC, we need to detect and judge the output of the process, and use graphics and statistics to predict whether the output of the process can meet the customer's requirements. Most companies choose minitab software as basic tools when implementing SPCs.
Statistical process control (SPC for short) is a process control tool with the help of mathematical statistical methods. It analyzes and evaluates the production process, discovers the signs of systemic factors in time according to feedback information, and adopts measures to eliminate its impact, so that the process is maintained in the control state that is affected by random factors to achieve the purpose of controlling quality.
It is the meaning of point in a software
SPC is the abbreviation of proceshen control. Statistical process control (SPC) is an industry standard methodology for measurement, control and quality improvement in the manufacturing process. It will draw the quality parameters that exist in product or other forms in the real -time production process to draw a chart that determines the control limit in advance, thereby helping the enterprise carry out real -time control and analysis of the production process. SPC software tools are a scientific, data -based quality analysis and improvement tool. With its help, the person in charge of the enterprise no longer has to rely on "guessing" quality management. Here, the control limit is determined by the process of production, and the tolerance limit is set according to the needs of customers.
control diagram
The data that fluctuates within the control limit indicates that all operations are consistent with expectations, and any fluctuations can be regarded as natural fluctuations that meet the expected during the production process. If the data point falls out of the control limit, it indicates that the production process is abnormal, and the person in charge of the enterprise needs to amend some nodes in the production process to ensure the normal production of production and achieve preventing problems before they occur.
In real -time SPC software tools, you can:
The abnormal fluctuations and product scrap rates of the production process are greatly reduced.
This to improve corporate productivity scientifically.
A effective reduction of production costs.
The hidden dangers in the process in time.
The response to any change in the process.
Cope accurate judgment and decision -making at any time at the manufacturing site.