Answer
The major differences between the spiral model and waterfall model of system development are as follows:
| SN | Spiral Model | Waterfall Model |
| 1 | Based on the concept of enhancement of
the initial prototype in a repetitive process. |
Based on a well-structured, sequential flow
of steps from beginning to end. Relatively rigid structure. |
| 2 | Can handle errors and bugs more easily
since the prototype is evaluated after each cycle. |
Difficult because the development has to
go back to the beginning if a error or bug needs to be rectified. |
| 3 | Process is iterative and repetitive | Process is based on a sequential flow where a step is started only after the preceding step ends. |
| 4 | Easier to accommodate sudden changes in
the requirements. |
Difficult to incorporate such sudden
changes in the requirement. |
| 5 | Suitable for complex projects which may need changes in the middle of the
development process. |
Suitable for large projects with large development teams. |