7 Basic Tools of Quality Control - A Brief Review
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This document discusses quality control and key concepts related to quality such as definitions of quality, the normal distribution curve, six sigma, and seven basic quality control tools. It explains that a process is considered out of control if a data point falls outside the control limits or there are nonrandom patterns within the limits. The rule of seven and assignable causes are also summarized.
7 Basic Tools of Quality Control - A Brief Review
- 3. Quality: a definition The degree to which a set of inherent characteristics fulfills requirements. Andy Crowe, PMP. The PMP Exam, How to Pass On Your First Try 5th ed.
- 5. Six Sigma (Std Dev) value 1 0.682689492137 2 0.954499736104 3 0.997300203937 4 0.999936657516 5 0.999999426697 6 0.999999998027
- 7. 7 Basic Tools of Quality Control 1. Fishbone Diagram 2. Checksheet 3. Histogram 4. Pareto Chart 5. Scatter Diagram 6. Control Chart 7. Flow Chart
- 8. 1. Fishbone Diagram (Ishikawa, Cause-Effect Diagram)
- 10. 3. Histogram
- 11. 4. Pareto Chart
- 12. Pareto Chart
- 14. 5. Scatter Diagram (Correlation Chart)
- 15. 6. Control Chart
- 16. Out of Control The process is out of state of statistical control under these two circumstances : 1. A data point falls outside the upper or lower control limit. 2. There are nonrandom data points; may happen within the upper and lower control limits.
- 17. Rule of Seven Refer to a group or series of nonrandom data points that total seven on one side of the mean. It tells you that although none of these points are outside of the control limits, they are not random and the process is out of control. Should investigate this type of situation and find a cause.
- 18. Assignable Cause/Special Cause Variation Signifies that a process is out of control. It means a data point or series of data falls outside the control limits and requires investigation to determine the cause of variation. We can use the cause and effect diagram to try uncover the root cause of the variation.
- 19. 7. Flowchart