Beginners Guide to Model-Based Systems Engineering

12/18/2018

Where Do You Find Requirements?

• System Concept Paper • Executive Order • Concept of Operations • Statement of Work • Vendor Package/Contract • Preliminary Specification

• Change Request Trade Study Report • Standards (MIL-STD or Commercial) • Meeting Minutes

• Business Plan • Market Analysis

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Desired Characteristics of Requirement Statements

• Necessary – remove it if the statement is not needed • Implementation independent – state what is required, not how the requirement is met • Unambiguous – generates a common understanding • Complete – can be understood in isolation

• Singular – addresses one thought • Feasible – is inherently possible • Verifiable – can confirm the requirement is satisfied • Correct – properly expresses the stakeholder expectation • Conforming – conforms in look and feel to organizational standards

Additional information available in INCOSE Guide for Writing Requirements

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