SPIRAL MODEL

In the Spiral Model, the Development process was carried out in a partwise/iterative manner.

In Spiral Model, the Development process can be partwise, in the sense suppose You take a example of Email Software, a customer gives his requirement to Bussiness Analyst that he is need a INBOX in Email Software, then the Bussiness Analyst will explain in a what the developer can understand, after INBOX, again customer calling to Bussiness Analyst to take my another requirement is I need COMPOSE for sending my mails, again BA is record his statements and explain to the developer, again developer could done all things, this way the Spiral Model works. It means the Spiral Model is easy to handle the requirements.

In Spiral Model, the requirement changes could be happening with two ways (1) MINOR CHANGES- In the Spiral Model the minor changes can be done easily. This minor changes cannot be impacted on design of the software. In the minor changes we could add and remove.the features. (2) MAJOR CHANGES- In the Spiral Model, the major changes could be happened, the previous part of the software was destroyed and the major changes in the software takes a slow process in this model.

ADVANTAGES OF SPIRAL MODEL- #- In Spiral Model Testing could be done with partwise manner, at a time we can do coding and testing to impress the customer. #- Requirement changes can be handled easily in minor changes. DISADVANTAGES OF SPIRAL MODEL- #-The main disadvantages of Spiral Model is it cannot handle the major changes in the software, suppose if the major changes happened the previously created part is destroyed automatically.