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functional requirements comparison table
Subject include is a kind of is a subtopic of describe has definition contain
requirements document document4.7 - Types of Requirements Document Any document describing a set of requirementsrequirements in the introduction and conclusion to avoid the problem of changing the requirements in one place and forgetting to change them in another place
functional requirementsrequirements document4.5 - Types of Requirementsparticular algorithms to be used 
  • What inputs the system should accept, and under what conditions
  • What outputs the system should produce, and under what conditions
  • What data the system should store that other systems might use
  • What computations the system should perform
  • The timing and synchronization of the above

Next requirements documentnon-functional requirements    Uprequirements document    Previous requirements documentrequirements document for a large system