Today we're going to be talking about Design FMEA, or Design Failure Mode and Effects Analysis.
Design FMEA should be done well in advance of design, before the drawing is released. It can be done as early as possible as long as you have enough design content to make the analysis work.
There are several reasons why you would do a Design FMEA. One of the obvious reasons is to improve the design to reduce risk of problems that might impact a customer.
However, what I want to talk about now is the link between Design FMEA and other tools within the Advanced Product Quality Planning (APQP) environment, or a Lean Manufacturing/Lean Design environment.
**Relationship between Design FMEA and Product FMEA**
Many people wonder why they should do a Design FMEA before a Process FMEA?
The answer is all about having design content available at the time of doing the Process FMEA. If I already have a drawing finished and the design is completed, a Design FMEA is not that important. In fact, you can find the information necessary for a Process FMEA on the drawing or the design of the product after it's been released.
However, prior to the drawing release, prior to the engineering design release date, the Design FMEA is a substitute for that drawing. As a substitute, it provides certain pieces of information that the process manufacturing individuals can use when designing the manufacturing process.
**What information comes from Design FMEA?**
The first piece of information that comes from the Design FMEA is special characteristics. Special characteristics come from the the cause column of the Design FMEA. They must be translated into geometric dimensional information for the process people to use that appropriately in their Process FMEA.
Other pieces of information that come from the Design FMEA are the effects of failure, the severity rankings for those effects, and the failure mode itself. Each of those pieces of information are dropped into the Process FMEA in appropriate columns.
**The benefit of linking Design FMEA and Product FMEA**
By making the link between Design FMEA and Process FMEA, we link the functional performance of the product and the manufacturing requirement of making the characteristics to blueprint specifications.
In addition, the process folks can now analyze the reasons why they could make the product incorrectly. And they go on to focus on what we refer to as the Six Ms: man, method, material, machine, measurement, and mother earth (also called "environment").
**ILearn more about Design FMEA**
Quality-One offers Design FMEA training, consulting and support services. Give us a call to schedule training at your location or ours.