characteristic, result or design feature which is made compulsory or has been prohibited for any reason


  • NOTE 1 Constraints are generally restrictions on the choice of solutions in a system.
  • NOTE 2 Two kinds of constraints are considered, those which concern solutions, and those which concern the use of the system.
  • NOTE 3 For example constraints can come from environmental and operational conditions, law, standards, market demand, investments and means availability, or the organization’s policy.
  • NOTE 4 Adapted from EN 1325-1.
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