Difference between Spiral model and Incremental model
Aspect | Spiral Model | Incremental Model |
---|---|---|
Definition | Spiral model is a software development model and is made with features of incremental, waterfall or evolutionary prototyping models. | Incremental Model is a software development model where the product is, analyzed, designed, implemented and tested incrementally until the product is finished. |
Planning | In spiral model requirements and early stage planning is also necessary. | In incremental model requirements and early stage planning is necessary. |
Flexibility to Change | Flexibility to change in spiral model is not that difficult. | Flexibility to change in incremental model is Easy. |
Risk | There is low amount risk in spiral model. | There is also low amount risk in incremental model. |
Cost | Cost of spiral model is very expensive. | Cost of incremental model is Low. |
Project Size | Spiral model can handle large project. | Incremental model can’t handle large project. |
Phases Overlapping | In spiral model overlapping of phases is not possible. | In incremental model overlapping of phases is possible. |
Testing | Testing is done in spiral model at the end of the engineering phase. | Testing is done in incremental model after every iteration of phase. |
Previous Stage Returning | Returning to previous stage/phase in spiral model is possible. | Returning to previous stage/phase in incremental model is possible. |
Team Size | In spiral model large team is required. | In incremental model large team is not required. |
Difference between Spiral model and Incremental model
The Spiral Model and Incremental Model both are software development life cycle models. The Spiral Model is a risk-driven software development model that handles risks early and can manage large projects but is expensive and requires a large team. On the other hand, the Incremental Model develops the product in smaller, manageable modules with easier changes, lower costs, and frequent testing after each iteration, suitable for smaller projects with smaller teams.
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