가장 고전적인 DevelopmentProcess

 1. Requirement analysis
 1. Analysis
 1. Design
 1. Implementation
 1. Testing
 1. Conversion
 1. Maintenance

== Characteristics ==
 * Deadlines are determined very early in the project
 * Required project results are completely and unambiguously determined
 * Project development phases are sequential and one-way
 * A milestone document concludes each project development phase

== Advantages ==
 * Every project phase cab be carefully planned
 * Authorities and responsibilities can be clearly delineated
 * At regular intervals(milestones), management can assess project progress and take corrective action if necessary

== Disadvantages ==
 * Everything is on the critical path
 * It takes too long to see results
 * It depends on stable, correct requirements
 * It promotes blind automation instead of reengineering

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요구사항이 명확하다면, 굳이 ObjectOriented방법으로 안가도 된다. ObjectOriented의 장점은 잦은 요구사항의 변화에 있다.