Process Assessment A disciplined evaluation of an organization’s software processes against a reference model ISO 15504]. Process Improvement A program of activities designed to improve the performance and maturity of the organization’s processes, and the result of such a program [CMMI]. Process improvementA program of activities designed to improve the performance and maturity of the organization’s processes, and the result of such a program [CMMI]. Process model (1) A framework wherein processes of the same nature are classified into an overall model, e.g. a test improvement model. (2) A method-independent process description of development processes.