Accounting Information Systems: The Processes and Controls, 2nd Edition

ELEMENTS OF THE SYSTEMS ANALYSIS PHASE OF THE SDLC (STUDY OBJECTIVE 4)

Exhibit 6-4 illustrates typical steps within the systems analysis phase of the SDLC: a preliminary investigation, a survey of the current system, a determination of user information needs, analysis, and business process reengineering. At the end of this phase, the project team will prepare and deliver a systems analysis report.

PRELIMINARY INVESTIGATION

The preliminary investigation occurs within a short period ranging from a few hours to a few days and should not exceed two to three days. The purpose of the preliminary investigation is to determine whether the problem or deficiency in the current system really exists. The project team may reexamine some of the feasibility aspects of the project. At this point, the purpose is to make a “go” or “no-go” decision. The end result is a decision to proceed further or to abandon the project.

Exhibit 6-4 Systems Analysis Process Map

SYSTEM SURVEY: THE STUDY OF THE CURRENT SYSTEM

In most cases, it is easier to improve something only when you have a good understanding of it. For example, it would be difficult for you to improve on the fuel efficiency of a car if you did not know details about how gas is used in the car, what quantities of gas the car uses, and which characteristics of the car affect fuel efficiency. Likewise, we cannot improve the efficiency and effectiveness ...