Handbook For Basic Process Improvement Page 31
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40Handbook for Basic Process Improvement
Step 8: Identify root causes for lack of capability
Steps 1 through 7 of the model
were concerned with gaining an
Step 7
understanding of the process and
documenting it. In Step 8, the
Brainstorm causes that may be
team begins the PDCA Cycle by
affecting the ability of the
identifying the root causes of a
process to meet the process
lack of process capability.
improvement objective
The data the team has looked at
Create a Cause-and-Effect
so far measure the output of the
Diagram
process. To improve the
process, the team must find what
causes the product or service to
be unsatisfactory. The team uses
Use multivoting or Nominal
Can the
a cause-and-effect diagram to
No
Group Technique (Part 2) to
causes be verified
identify root causes. This tool is
identify the most likely cause
from the data
for lack of process capability
collected?
explained in the Basic Tools for
Process Improvement.
Yes
Once the team identifies possible
root causes, it is important to
Plot the data in a Pareto Chart
collect data to determine how
much these causes actually affect
Select a root cause to work on
the results . People are often
to improve the process
surprised to find that the data do
not substantiate their predictions,
or their gut feelings, as to root
Assess whether other people
are needed to help with this
causes.
process improvement
The team can use a Pareto chart
to show the relative importance of
Step 9
the causes they have identified.
The tools the team needs to
identify the root causes for lack of capability are explained in the following modules of the
Basic Tools for Process Improvement :
Module 1:
Operational Definitions
Module 2:
Brainstorming
Module 3:
Decision-Making Tools
Module 4:
Affinity Diagram
Module 5:
Cause-and-Effect Diagram
Module 8:
Pareto Chart
27
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