Spiral lifecycle model
Spiral model is an evolutionary version of incremental prototyping, developed by Boehm in 1988. Each iteration of the prototype represented as a cycle in the spiral. The Spiral software development model is a risk-oriented.Spiral software development model may be applicable to projects where:
The planning objectives are to define resources, project alternatives, time lines and other project related information.
The purpose of the risk analysis phase is to assess both technical and management risks.
The engineering task is to build one or more representations of the application.
The construction and release task – to construct, test, install and provide user support (e.g., documentation and training).
The customer evaluation task - to obtain customer feedback based on the evaluation of the software representation created during the engineering stage and implemented during the install stage.
Advantages
Disadvantages
- High amount of risk analysis
- Good for large and mission-critical projects.
- Software is produced early in the software life cycle.
- Can be a costly model to use.
- Risk analysis requires highly specific expertise.
- Project's success is highly dependent on the risk analysis phase.
- Doesn't work well for smaller projects.
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