Advantages:

• Builds a successively larger version with each increment.

• Requirements need not be fully known at the start.

• To simply tracking, each build increment can internally follow a Waterfall life cycle.

• Process can repeat as long as necessary.

• Improved feedback as output is assessed before next increment.

• Matches how most products are actually developed.

Disadvantages:

• Assumes that new requirements will not be mutually exclusive with earlier requirements.

• Assumes that architecture developed early will be compatible with later requirements.

The disadvantages of Evolutionary become critical if Change Control is not used during development (Feature Creep).