| Step | Key Question | Exit Criteria |
| Problem Definition | What is the problem | Statement of scope and objectives |
| Feasibility study | Is there a feasible solution | Rough cost/benefit analysis |
| Analysis | What must be done to solve the problem | Logical model of system Data flow diagram Data dictionary algorithm |
| System design | How, in general, should the problem be solved? | Alternative solutions System flow diagrams cost/benefit analysis |
| Detailed design | How, specifically, should the system be implemented? | Implementation specifications HIPO Pseudo code, Orr diagrams, Hardware specifications, Preliminary test plan, implementation schedule |
| Implementation | Do it | Programs Code, Documentation, Hard ware Operating procedures Security ,, Formal system test |
| Maintenance | Modify the system as necessary | Continuing support |
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