Why is SRS also known as the blackbox specification of system ?
Ans: SRS document is a contract among the development team and the customer. Once the SRS document is accepted by the customer, any subsequent controversies are settled by referring the SRS document. The SRS document is called as black-box specification. Since the system is considered as a black box whose internal details are not known and only its visible external (i.e. input/output) behaviour is recognized.