A design specification is a detailed document that sets out exaclty what a product or a process should present. For example, the design specification could include required dimensions, environmental factors, ergonomic factors, aesthetic factors, maintenance that will be needed, etc. It may also give specific examples of how the design should be executed, helping others work properly (a guideline for what the person should do).
An example design specification is shown below. Columns and information may be adjustable based on the output format (may be a physical product, or software, etc.)
|Number||Category||Demand / want||Weighting||Requirement||Success criteria||Method of assessment||Date modified|
|1||Aesthetics||Demand||2||Product must be blue||Product is blue||Visual analysis||03-21|
|2||Cost||Demand||1||Product costs less than £300||Product is less than £300||Component cost analysis||03-21|
|3||Function||Want||3||Product is||Product can reduce by at least 1/2 its size||Prototype testing||05-21|