Model
In Royce's original waterfall model, the following phases are followed in order:
- Requirements specification
- Design
- Construction (implementation or coding)
- Integration
- Testing and debugging (validation)
- Installation
- Maintenance
Thus the waterfall model maintains that one should move to a phase only when its preceding phase is completed and perfected. Various modified waterfall models (including Royce's final model), however, can include slight or major variations on this process.
Read more about this topic: Waterfall Model
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