Inception: Requirements capture and analysis
The inception phase is a preparatory stage that attempts to answer the following questions:
What is the purpose of the project?
Is the project feasible (e.g. technologically, financially, with current personnel)?
Should we buy the project, or build it?
Will it be developed now, or built from an existing project?
What are the estimated costs?
Should we proceed with the project?
Elaboration: System and class-level design
The main purpose of the elaboration phase is to begin to understand how the software will solve this problem
Construction: Implementation and testing
The construction phase involves iterative enhancement to previously created artifacts:
Domain model
Design model
Implementation
Implementation of high-risk problems is done during the elaboration phase
During the construction phase, the lower-risk problems are implemented
Also, the various components (potentially created by different teams) are unit tested, integrated, and integration tested
Quality assurance plays an important role in the Construction phase
Transition: Deployment
During this phase, the software produced at the end of the construction phase is deployed
This could involve:
Rigorous complete system testing
Installation programs being purchased or developed
Software media being developed
Solutions for support/user training being implemented
Best testing under varied deployment environments
Verifying that the system meets acceptance criteria
gregorymasila answered the question on January 24, 2018 at 13:39
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