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.


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 to build his ...

Get A Practical Guide to SysML: The Systems Modeling Language now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.