Effects of Changing the Process FMEA

PFMEA

Change in Detection

Change in Occurrence

Change in Severity

Work Instruction

Design Change

Control Plan

And

Or

Other Action

A change in the severity of the effect of a potential problem can only be effected through a design change.

When making a change to a document, it is important to consider the effects of that change on other documents. Typically the engineering change system in a company and/or corrective action system ensures these occur. But this is not always the case. Review your company engineering change procedure / system and see if it does so.

Previous slide

Next slide

Back to first slide

View graphic version

When you change your process FMEA there are several documents which should be reviewed and, often, one or more will require changes. For example, if you add a potential problem to the FMEA for evaluation, after the evaluation it may or may not lead to an addition to the control plan. The same is true of the work instruction.

It should be noted that a change in a ‘severity’ on an FMEA can only be accomplished through a design change. Why is this so? This is because a change in the severity of the effect of a potential problem will not change by changing how often it occurs nor will it change by changing the probability of detection. These two issues do not change the effect(s) of the problem in any way, shape or form.

It should be evident that a change in detection on the process FMEA necessarily causes a change in the either the related work instruction (it may in fact cause the initiation of a new work instruction) and/or the control plan. In some cases another action may be initiated or changed in response to a change in detection. An example would be where a change in the process (driving the process flow diagram to change) is effected in response to an FMEA. The same is true with respect to a change in the occurrence. Changing the occurrence may, for example, change the sampling method, frequency, etc. on the control plan.

The Juran Trilogy	The Deming PDCA Cycle	QMS Implementation	FMEA Information	APQP Information
Auditing Information	8-D Problem Solving	Statistics	Error Proofing (Poka Yoke)	Brainstorming
Identifying Waste	Pull Systems	Lead Time Reduction	Planned Maintenance	Quick Setup
Discovering Change	Process Capability - Cp vs. Cpk	Histogram Animation	Process Loop Animation	Taguchi Loss Function
		Fishbone / Cause and Effects Animation

All Y'All Come Back Now, Y' Hear?

Forums provided and maintained by Marc Smith

FAIR USE and CORRECTNESS NOTICE: This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes. For more information go to: http://www.law.cornell.edu/uscode/17/ If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner. In addition, I do not guarantee the correctness of the content. The risk of using content from the Elsmar Cove web site and forums remains with the user.