Control Charts and Root Cause

1
Control Charts and Root Cause

• Ethics Training
• Ana-Lab Corp.
• 08/21/07

2
Control Charts and Root Cause

• Some are having difficulty with the usefulness of
  control charts
• Control charts are not just something else to do
• Control charts are a useful tool in evaluating
  the system

3
A problem well stated is half solved.

• The STANDARD is OUT
• The LCS FAILED
• The BLANK DIDNT WORK

4
Control Charts

• Recognize the problem not the symptom
• The Standard is OUT is NOT the problem!
• The problem is, The system does not produce
  consistent results as indicated by known values
  that are not reproduced consistently.

5
What to do.

• Ignore it, deny that is exists
• Make it bearable temporarily, ie. re-run the
  standards until they pass.
• Run multiple standards and delete the ones that
  fail.

6
Solve the problem

• If we dont solve the problem, we will continue
  to have the same failures.
• Develop a solution that eliminates the root cause
  or reduces the impact of the issue.
• Involve your supervisor and/or co-workers.

7
Control Charts and Root Cause

• Objective data identifies the scope and details
  of the problem.
• Production and Quality are compatible
• Quality improves production

8
Produce a selection of solutions

• There is usually more than one action possible.
• Combine possibilities to produce solutions.

9
Ask, What if

• Engage in risk analysis
• Find possible weak points
• Anticipate failures
• Reduce risks

10
Control Charts Show

• Most resent 50 data points
• Mean (Average)
• Standard Deviation
• /- 2 Std. Deviation (warning limit)
• /- 3 Std. Deviations (control limit)

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Tendencies/Trends

• Points that are between /- 2 and /- 3 STD
• More than four points in the same direction
• More than seven consecutive points above or
  below the mean

12
Reduce failure re-occurrences.

• Preventive Action
• Or
• Corrective Action

13
Control Charts

• Available on LDS Client
• Everyone needs to learn to use Control Charts

14
You are the Solution

• Everyone is counting on
• YOU!