Design specification
A design specification is a document which details exactly what criteria a product or a process should comply with. If the product or its design are being created on behalf of a customer, the specification should reflect the requirements of the customer or client. A design specification could, for example, include required dimensions, environmental factors, ergonomic factors, aesthetic factors, maintenance requirement, etc. It may also give specific examples of how the design should be executed, helping others work properly.
Example of a design specification
An example design specification, which may be a physical product, software, the construction of a building, or another type of output. Columns and information may be adjustable based on the output format.| Number | Category | Demand / want | Weighting number | 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 collapsible | Product can reduce by at least 1/2 its size | Prototype testing | 05-21 |
| 4 | ... | - | - | - | - | - | - |