This paper identifies an effective graphical way for capturing requirement specifications of the system during the early design phase of software engineering to reduce the software failure. Further, it proposes a concept of bridge to show; how that technique called Message Sequence Chart (ITU-T, Z.120 standardized language) can be used to gather and describe the specifications of the software system during the requirement analysis phase of Software Engineering, which is demonstrated by means of “Automated Teller Machine (ATM)”.

Keywords : Message Sequence Chart (MSC), Requirement/Specification/Analysis, Bridge, ATM, Software System, Customer, Developer.