This methodology was developed by the American company SSA (System Software Associates Inc.) for the implementation of the BPCS system. It is used by ISA and Deliotte & Touche companies and includes 5 phases:
1. definition of the project,
2. preparation of implementation,
3. making changes and their verification,
5. review and optimization of the system operation.
Project phases 1,2,3 can overlap in part. Each phase is settled separately within the entire project.