Design for Robustness.PPT

11/28/2000 MPD575 Borkes/Liotino/Person; rev. Boettcher/Figloli/Rinke 11/28/2000 Design for Robustness Critique Ford Confidential Material Enclosed Design For Robustness MPD575 DFX Jonathan Weaver Development History Originally developed by Cohort 1 students: Steve Borkes, Larry Liotino, Dennis Person (Fall 2000) Revised by Cohort 1 students: Tom Boettcher, Al Figlioli, and John Rinke (Fall 2000) Design for Robustness (DFR) Introduction to DFR DFR Timing DFR Key Principles and Procedures Robustness Case Studies DFR Software Conclusions References Introductionto DFR Elements of Quality Introduction to DFR DFR is a key enabler for: Design for Quality Design for Reliability Robust System Design Design for Six Sigma Robustness Defined Robustness is: The capability of a product or process to perform its intended function consistently in the presence of noise during its expected life That is, the performance of the product or process is insensitive to sources of variability Robustness Defined Sources of variability, or “noises”, can be grouped in the following categories: Manufacturing Variation Wear-out/Fatigue Customer Usage External Environment System Interactions Robustness Defined The premise of robust design is that a product that performs its function on target will generate the smallest loss to the customer and the producer (e.g., cost to repair or replace, cost of customer dissatisfaction). As a product deviates from its target response or expected output, cost will begin to accrue in one way or another Customers tend to be more satisfied with their purchases if the product is robust and reliable Robustness Defined Robustness requires a shift from What is wrong and how do we fix it? way of thinking to What is the intent and how do we maximize it? [Dr. Genichi Taguchi] Instead of trying to control, compensate, or eliminate usage variations, robustness attempts to make the system insensitive to usage variations. [Dr. Genichi Taguchi] Introduction to