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The_Needs_SpecificationSpring2011

The_Needs_SpecificationSpring2011 - TheRequirement...

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The Requirement  Specification
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References Adapted from: Design for Electrical and Computer Engineers,  first edition, by Ralph M. Ford and Chris S.  Coulston Excerpts from the book “Engineering Design, a  Project Based Introduction”, second edition by  Clive I. Dym and Patrick Little. John Wiley and  Sons, Inc. ISBN 0-471-25687-0
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Specification A detailed and exact statement of  particulars, a statement fully describing  something to be built. American Heritage Dictionary Specifications A detailed, exact statement of  particulars, especially a statement prescribing  materials, dimensions, and  quality of work  for  something to be built, installed, or manufactured. answers.com   Definitions
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Definitions Requirement Specification: Collection of both Marketing and Engineering  requirements that the design must satisfy in order for  it to be successful. Part of the requirement are the objectives
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5 Marketing Requirement (Statements of the Client and  User Needs)  Short statements that describe the need in the language of the  client (or the user) “The car must acquire high speed fast” Engineering Requirement Short statements that describe the technical needs of the design The Marketing Requirements should be translated into  Engineering Requirements “The car should have high acceleration” Definitions
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IEEE Std 1233, 1998 Edition This guide provides guidance for the  development of a set of requirements that, when  realized, will satisfy an expressed need. 
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Engineering Requirements 7
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Engineering Requirements  Properties 1) Abstract What the system will do, not how it will be  implemented 1) Verifiable There should be a way to measure or demonstrate  that the requirement is met in the final realization 8
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Engineering Requirements  Properties 1. Unambiguous Each requirement should have a single  unambiguous meaning and be stated with short  complete sentences. 1. Traceable Each Engineering requirement should be traceable  to a Marketing Requirement IEEE Std. 1233-1998 9
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Example Does the following requirement meet the four  desirable properties? (abstract, verifiable,  unambiguous, traceable) “The robot must have an average forward speed of  0.5 feet/sec, a top speed of at least one foot/sec, 
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