V-Model

What is V Model

it's a project management approach and modified version of the Waterfall model. It's designed to be non-linear

Testing phase for each corresponding development stage

How does it work

Verification phases on one side validation phases on the other side

Where is it suitable

• Requirements are well defined, documented,and fixed in place
• Product definition is stable
• Technology well understood
• No ambiguous requirements
• Short projects

Advantages

• Quite easy to understand
• Disciplined model where phases are complete one at a time
• Works well for small projects
• Easy to manage dur to the rigidity of the model

Disadvantages

• Model is not flexible to changes in requirements
• Requirements changes are disruptive and expensive
• High risk and uncertainty
• Not a good model for complex projects
• Once in testing, difficult to go back
• No working software produces until late in the day