Lecture 4-Chapter 4

Lecture 4-Chapter 4 - CHAPTER 4 SUPPLEMENT Reliability Design Process(Review • Effective design can provide a competitive edge – matches

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Unformatted text preview: CHAPTER 4 SUPPLEMENT: Reliability Design Process (Review) • Effective design can provide a competitive edge – matches product or service characteristics with customer requirements – ensures that customer requirements are met in the simplest and least costly manner – reduces time required to design a new product or service – minimizes revisions necessary to make a design workable Design Process (cont.) • Product design – defines appearance of product – sets standards for performance – specifies which materials are to be used – determines dimensions and tolerances • Service design – specifies what physical items, sensual benefits, and psychological benefits customer is to receive from service – defines environment in which service will take place Design Process (cont.) Pilot run and final tests New product or service launch Final design Final design & process plans & process plans Idea generation Feasibility study Product or Product or service concept service concept Performance Performance specifications specifications Functional design Form design Production design Revising and testing Revising and testing prototypes prototypes Design Design specifications specifications Manufacturing Manufacturing or delivery or delivery specifications specifications Suppliers Suppliers R&D R&D Customers Customers Marketing Marketing Competitors Competitors Form and Functional Design • Form Design – how product will look? • Functional Design – reliability – maintainability – usability Chapter 4 Supplement Outline A. Reliability B. Rules for reliability C. Availability Reliability • Reliability : – The ability of a product, part, or system to perform its intended function under a prescribed set of conditions • Failure : – Situation in which a product, part, or system does not perform as intended • Normal operating conditions: – The set of conditions under which an item’s reliability is specified • Reliability is used in two ways: – The probability that the product or system will function when activated (instantaneous reliability) – The probability that the product or system will function for a given length of time (continuous reliability) • Independent events • Redundancy – The use of back up components to increase reliability Reliability Rules for reliability • Rule 1: – If two or more events are independent and the success is defined as the probability that all of the events occur, than the probability of success is equal to the product of the probabilities of the events • Rule 2: – If two events are independent and success is defined as the probability that at least one of the events will occur, the probability of success is equal to the probability of either one plus (1- that probability) multiplied by the other probability Rules for reliability • Rule 3: – If three events are involved and success is defined as the probability that at least one of the events will occur, the probability of success is equal to the...
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This note was uploaded on 03/15/2010 for the course BUSINESS MGT200 taught by Professor Manjuris during the Spring '08 term at Ryerson.

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Lecture 4-Chapter 4 - CHAPTER 4 SUPPLEMENT Reliability Design Process(Review • Effective design can provide a competitive edge – matches

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