文档介绍：DOEDOE ApplicationsApplications
Oct 16th 2002
ASQ Section 702: San Gabriel Valley
by
Dr. Raj Palanna
Objective of Talk
❚ Give a “flavor” for actual applications of
DOE in industry
❚ Provide an insight into plex
theoretical concepts are applied in real-
world situations
❚ Build on the ASQ 702 September
presentation DOE - Basic Concepts by Dr.
Kurt Palmer
Agenda
❚ Deep Dive - 2 Examples
❚ Quick High Level Overview - Few More
Applications
❚ Q&A
* These examples are taken from applications at panies. Some of the data and facts have been “coded” to protect proprietary information.
1. ECS Pack Switch Failure
Investigation
❚ Starting February 2002 (until April 2002) a
total of 21 switches have been rejected at
XXX pany’s aircraft test line, for
failure to “open” at max. 200 deg. F.
❚ Shipments of multi million dollar aircraft are
at risk
Key Planning Aspects
❚ Immediate containment actions taken
❚ Teams working at 3 tiers of supply chain
❚ Evaluate the “usual suspects”*
❙ Testing setup and process
❙ Manufacturing process
❙ Application at system level, etc
❚ Different schools of quality uses slightly
different methods for this exercise
* This presentation will concentrate only on the DOE aspect of the problem
DOE Problem Statement
❚ Parts that failed at customer passed at supplier
test process. Test method is a suspect. A DOE
was set up to understand the sensitivity of
switches to the test parameters
❚ 6 Parts were chosen for DOE - 3 New, 3
Rejected
DOE Pre-planing
❚ plex DOE THOUGHT MAP was developed
❙ Factor Selection
❙ Response Selection
❙ Measurement Repeatability Studies
❙ Noise Impact
❙ Confounding
❙ Randomization
❙ Resource Logistics
❙ Management Approvals
❙ Observation/ Copious Notes
❙ etc
DOE Orthogonal Matrix
Building Exercise
❚ You Have Been Tasked to Optimize Gas
Mileage on Your Car
❙ Team Needs to Test 4 Factors
❙ Has Resources for 8 Runs
❙ Res