Spiral model - Advantages and Disadvantages

Spiral Model:

• This model is mostly used by product based companies.
• For each and every iteration, a new version of software is released.
• Spiral model is iterative model or version control model.
• Spiral model overcome drawbacks of waterfall model.
• We follow spiral model whenever there is dependency on the modules.
• In every cycle new software will be released to customer.
• Software will be released in multiple versions. So, it is called version control model.

Advantages of Spiral model:

• Testing is done in every cycle before going to the next cycle.
• Customer will get to use the software for every module.
• Requirement changes are allowed after every cycle before going to the next cycle.

Disadvantages of Spiral model:

• Requirement changes are not allowed in between the cycle.
• Every cycle of spiral model looks like waterfall model.
• There is no testing in requirement & design phase.