System Analysis lecture 3

This lecture covers the requirments gathering for the system developement
In this stage Analyst will study about the organization structure, business process and information flow. this stage called as fact finding also. The Analyst will conduct interviews with each level of people and he will gather information and he will come to know the information flow and communication of Information. This stage conatins 2 defining ways
1.Logical modeling

2.Physical modeling

Primary information gatherring techniques
build prototype working models.

Prototype working models
Conduct JAD sessions
research vendor solutions
observe and document business processes
Once the Analyst models each and every process, he will note down the functions what the new system should according to the procedures and business functions. In this stage Analyst shoud consider about the security measures also. People who are in new system

1.Users

2.Clients

3.Technical staff (Analyst will conduct interview wil each and every group of person) There are some techniques that Analyst follows while gathering requirments

1.Structural Approach - create model of existing system and gathers information of existing system
2.Current Approach - Identifying logical requirements and balancing the new system requirements This stage includes fact finding way also which means reviewing the old system reports, invoices, information flows, and forms etc and then the Analyst will gather how the information flows at current situation and he will know about the current rules and redundancies and understands the process. Another stage of requirment gathering is preparing checklist, this contents the current system functions and the the new system functions. and the additional things that new system should do. In this stage, the Analyst will conductt interviews with each people or group of people. This will bbe an expense for the organization, but the Analyst should get the correct information from the users.