Lecture 6 - IE 330 Industrial Quality Control Lecture 6 Chapter 5 Conceptual framework for SPC Key Concepts 1 2 Sources of Variation and Their

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
IE 330 Industrial Quality Control Lecture 6: Chapter 5 Conceptual framework for SPC
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Key Concepts 1. Sources of Variation and Their Control Measure Manufacturing Field Use 2. Process Behavior Over Time Building Statistical Models/Assumptions Control VS capability How Processes vary over time Mean Level/Amount of Variation 3. Shewhart’s Concept of Statistical Control of a Process Predict Routine Behavior within Stat limits Control Means Predictable Control VS Capability Control System of Common Causes
Background image of page 2
Sources of Functional Variation Taguchi: variation in product and process function arises from three basic sources. Outer Noise: Inner Noise: Variational Noise:
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Example – Braking Distance of an Automobile Outer Noise Wet or Dry road Concrete or Asphalt Pavement Number of Passengers in the Car Inner Noise The Leakage of brake fluid The Wear of brake drums and brake pads Variational Noise Variation in the friction coefficient of pads and drums The amount of brake fluid
Background image of page 4
How do we Combat these Sources of Noise Variations? Outer and Inner Noise: only by the design process Variational noise: manufacturing imperfection – can be dealt with Statistical Process Control (SPC). How the Sources of variation are transmitted to the Quality response of the Product?
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Impact of Sources of variation on Quality Performance
Background image of page 6
Impact of Sources of variation on Quality Performance Product use in the Product use in the field field Temp Power Power
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Impact of Sources of variation on Quality Performance
Background image of page 8
Manufacturing/Process Variation Shewhart, Deming, and Juran: quality/productivity problems into two basic categories: 1. Common causes/System faults/Chance causes/Chronic problems, e.g., poor supervision, poor training - make up 85% of the causes - are the responsibility of the management to address
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/07/2008 for the course IE 330 taught by Professor Tezcan during the Spring '08 term at University of Illinois at Urbana–Champaign.

Page1 / 34

Lecture 6 - IE 330 Industrial Quality Control Lecture 6 Chapter 5 Conceptual framework for SPC Key Concepts 1 2 Sources of Variation and Their

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online