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 ...