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7 QC Tools:

7 QC Tools: . Flowchart Check Sheet Histogram Pareto Cause-and-Effect Scatter Control Chart. Pareto Diagram. Step 1: Decide on problem, type of data, and causes or categories. Step 2: Collect the data. . Step 3: Order the causes or categories. .

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7 QC Tools:

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  1. 7 QC Tools: • Flowchart • Check Sheet • Histogram • Pareto • Cause-and-Effect • Scatter • Control Chart

  2. Pareto Diagram

  3. Step 1: Decide on problem, type of data, and causes or categories.

  4. Step 2: Collect the data.

  5. Step 3: Order the causes or categories.

  6. Step 4: Calculate the cumulative totals.

  7. Step 5: Draw and label the horizontal axis.

  8. Step 6: Draw, scale, and label the vertical axis.

  9. Step 7: Draw bars for each cause or category.

  10. Step 8: Draw cumulative total lines.

  11. Interpret the Pareto Chart.

  12. Pareto Diagram (Using EXCEL) • Create a table listing the sources of defects in the first column • and in the second column calculate the total number of defects per • source.

  13. Sort the table by the total number of defects in descending order. • In the third column, calculate the cumulative percentage for each row • in the table. • Create a chart with the ChartWizard (custom --- line-column • on two axes).

  14. Cause and Effect Diagram

  15. Step 1: Develop problem statement.

  16. Step 2: Brainstorm causes.

  17. Step 2: Brainstorm causes.

  18. Step 3: Determine the major cause categories.

  19. Step 4: Determine the category for Each listed cause.

  20. Step 4: Determine the category for Each listed cause.

  21. Step 5: Put categories and causes On cause & effect diagram.

  22. Step 6: Identify the most likely causes.

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