Once the required information is completely gathered it is documented in a URD, which is meant to spell out exactly what the software must do and becomes part of the contractual agreement.
[1] User Requirement Specifications (URS) are important in the pharmaceutical industry for regulatory and business purposes.
For example, a business consideration could be the foot print of equipment prior to installation to ensure there is enough room.
URS ensure everything is considered and the supplier provides the components, features, and design required to meet the company needs.
By considering more and having the components, features, and design required, the system, process, or equipment can be aligned with company interests and easily integrated.