Handbook For Basic Process Improvement Page 30

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Handbook for Basic Process Improvement
that’s the case, the team may elect to continue trying to improve the process by
entering Step 8 of the Basic Process Improvement Model.
If there are no specification limits for the process, does the shape of the
histogram approximate a bell curve?
After examining the shape created by
plotting the data on the histogram, the team has to decide whether the shape is
satisfactory and whether the data points are close enough to the target value.
These are subjective decisions. If the team is satisfied with both the shape and the
clustering of data points, they can choose to standardize the simplified process or to
continue through the steps of the Basic Process Improvement Model.
From here to the end of the Basic Process Improvement Model, the team is going to use a
scientific methodology for conducting process improvement called the Plan-Do-Check-Act
(PDCA) Cycle. They will plan a change, conduct a test and collect data, evaluate the test
results to find out whether the process improved, and decide whether to standardize or
continue to improve the process. The PDCA Cycle is just that: a cycle. There are no
limitations on how many times the team can attempt to improve the process incrementally.
Plan
Act
(Steps 9 & 10)
(Steps 13 & 14)
Check
Do
(Steps 12 & 13)
(Step 11)
The tools the team needs to assess whether the process is capable are explained in the
following modules of the Basic Tools for Process Improvement :
Module 1:
Operational Definitions
Module 7:
Data Collection
Module 11: Histogram
26

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