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A Practical Guide to SysML by Rick Steiner, Alan Moore, Sanford Friedenthal

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Chapter 12 Modeling Text-Based Requirements and Their Relationship to Design

  This chapter describes how text-based requirements are captured in the model and related to other model elements. This chapter also describes the diagrammatic representations and special notations used to represent requirements and other cross-cutting relationships, such as allocations, in a SysML model.

12.1. Overview

 A requirement specifies a capability or condition that must (or should) be satisfied, a function that a system must perform, or a performance condition a system must achieve.

 Requirements come from many sources. Sometimes requirements are provided directly by the person or organization paying for the system, such as a customer who hires a contractor ...

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