Determine the benefits of developing prototype
According to SOMM [96] benefits of developing prototype are as following: 
1.  Communication gap between clients and software developer may be identified. 
2.  Ambiguous user requirements may be depicted. 
3.  Missing user requirements may beunearthed. 
4.  A small working system is quickly built to demonstrate feasibility and usefulness of application to management.
5.  It serves as foundation for writing the specification of system.