Ṣpiral model-:
Process is represented as a spiral rather than as a sequence of activities with backtracking.
Each loop in the spiral represents a phase in the process.
No fixed phases such as specification or design -loop in the spiral are chosen depending on what is required.
Risks are explicitly assessed and resolved throughout the process.
- risk driven process model
- used for generating software projects
- alternate solution is provided if any risk found in the
risk analysis then alternate solutions are suggested and implemented
- combination of proto type and sequential model or waterfall
model
- one iteration all activities are done for large projects
the output is small.
>>>>>>> - Planning
- Modelling
- Construction
- Deployment
- Communication
Advantages
- Reduce high amount of risk
- Good for large and critical projects
- Strong approval and
documentation control
- The software is produced early in the life cycle
