SW Project lifecycle models: Evolutionary/ Iterative

Specify

Design

Implement

Test

Release

Specify

Design

Implement

Test

Release

Specify

Design

Implement

Test

Release

Specify

Design

Implement

Test

Release

Time

Earlier implementation can be changed.

For example:

- user interface concept

Release 1

Release 2

Release 3

Release 4, the whole system

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