If you ever wondered what a standard is, well the answer can be tricky and the explanation can become pretty hard. To clarify it I will qoute standards.gov: a standard means “Common and repeated use of rules, conditions, guidelines or characteristics for products or related processes and production methods, and related management systems practices” . By classifing the standards in prescriptive and performance ones the term may become more understandable. The prescriptive standard comes in discussion when you start working on something and you do it in a known way that has been done before and it was defined somewhere to make it easier for you to follow the correct steps.
The performance standard defines requirements in terms of getting to a required result. It also states ways of verification but it won’t include steps for getting to the desired result.
Also standards can be differentiated based on purpose and can be classified by the intended user group.
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