The corresponding testing phase of the development phase is planned in parallel, as you can see above. For every phase in the development cycle, there is an associated testing phase. You have a corresponding testing activity for each stage. All the requirements are gathered at the start and cannot be changed. The V model (Verification and Validation model) is an extension of the waterfall model. The waterfall model has a rigid structure, so it should be used in cases where the requirements are understood completely and unlikely to radically change. There is no way to see or try the software until the last phase. Since it’s inflexible, it can’t adapt to changes. It doesn’t require a lot of customer involvement after the specification is done.

The waterfall model is easy to understand and follow.

The software process isn’t linear, so the documents produced may need to be modified to reflect changes. However, in practice, these phases are very likely to overlap and may feed information to one another. This involves the amount and availability of funds, staff, and other resources.Įach of these phases produces one or more documents that need to be approved before the next phase begins. This involves the developers’ knowledge and experience with the project domain, software tools, language, and methods needed for development. Is the project highly time-bound with a huge cost of delay, or are the timelines flexible? Customer involvementĭo you need to consult the customers during the process? Does the user need to participate in all phases? Familiarity with technology Ask yourself if the project requires constant monitoring or feedback from the client. The requirements may change often, and the cost of delay is high. Project complexityĬomplex projects may not have clear requirements. Larger projects mean bigger teams, so you’ll need more extensive and elaborate project management plans.

Will the user need to specify requirements in detail after each iterative session? Will the requirements change during the development process? Project sizeĬonsider the size of the project you will be working on. You need to keep the following factors in mind when selecting your software process model: Project requirementsīefore you choose a model, take some time to go through the project requirements and clarify them alongside your organization’s or team’s expectations. If you know your requirements well, it will be easier to select a model that best matches your needs. Choosing the right software process model for your project can be difficult.

Fed ato business process model example