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Intro | Defining tasks functions | Lifecycle requirements | Principles good requirements | Structuring output

Lifecycle requirements

A requirements matrix can be used to help ensure that all the necessary requirements have been captured. The matrix combines each of the common requirements headings, with each of the main lifecycle stages of the product.

Common requirement headings

  • Performance requirements
  • Cost requirements
  • Process requirements

Main lifecycle stages

  • Design
  • Manufacturing and distribution
  • Purchasing and set-up
  • Usage
  • Disposal
Example of the headings that could be suitable for requirements specification
Performance Cost Process
Design Design performance Design cost Design process
Manufacturing & distribution Manufacturing performance Manufacturing cost Manufacturing process
Purchasing & set-up Purchasing performance Purchasing cost Purchasing process
Usage Usage performance Usage cost Usage process
Disposal Disposal performance Disposal cost Disposal process