Standards of performance-

Standards of performance are the set of complex requirement that cover a wide field which may include such things as reliability level, safety, convenience in use, adaptability under various condituons, ease of maintainance and cost. Each of these must be considered and due attention paid while designing. At the need analysis stage itself one must list the relevant performance parameters and, if possible, decide on the minimum acceptable performance on each of those parameters. This only settles tha minimum that must be met, and the competing designs are judged depending on how much they better these minimums. However, there are cases where deciding a priori the minimum is not at all an easy task.