This standard specifies the software development cost evaluation process and methods in the field of software engineering. This standard is applicable to: a) Software companies or institutions that wish to establish software process cost assessments; b) Software evaluation agencies, software industry associations or third-party assessment organizations entrusted to assess software engineering costs; c) Intentions to assess software engineering costs and options Demand-side of software suppliers; d) Relevant government management departments, industrial parks, etc. that need to conduct in-process and post-supervision and verification of software project costs; e) Other occasions that require application.