Software Engineering. Quality requirements for Systems and Software (SQuaRE). Requirements for the Quality of a Ready-to-Use Software Product (RUSP) and Test Instructions.

Quality requirements for Ready to Use Software Product (RUSP);
requirements for test documentation for testing RUSP, including test plan, test description and test results;
instructions for conformity assessment of RUSP.
It also includes recommendations for safety or mission-critical RUSP.

ISO/IEC 25051:2014 is only about giving the user confidence that the RUSP will perform as offered and delivered. It is not about the realization of production (including activities and intermediates, for example, specifications). A supplier's quality system is outside the scope of ISO/IEC 25051:2014.