Most software development projects are planned and executed along the lines of a software development lifecycle model that is chosen in advance. Such models are also referred to as software development process models or, more concisely, development models.
Such a model divides a project into separate sections, phases, or iterations and arranges the resulting tasks and activities in a corresponding logical order (see [URL: SW-Dev-Process]). Additionally, the model usually describes the roles that each task is assigned to and which of the project’s participants is responsible for each task. The development methods to be used in the individual phases are often described in detail too.
Every development model has its own concepts regarding testing, and these can vary widely in meaning and scope. The following sections detail popular development models from a tester’s point of view.
Types of lifecycle models
The two basic types of development model in use today are sequential and iterative/incremental. The following sections include discussion of both types.
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