Page 499 - Using MIS

Q4 What Are the Phases in the Systems Development Life Cycle (SDLC)? 467

Check Customer Credit Process
Sales Credit Analyst Customer Credit IS Credit Credit Agency
(out of process) Manager (External Company)

Get Customer
Credit Request From Sales
Credit History
Read Customer
Credit History
Prior Credit
Problems?
No
Yes
Customer Credit Database
Credit Rejection to Sales
Return Rejection

Request Exceeds Update Customer
$50,000 Credit

No
Yes
Credit Acceptance to Sales
Return Acceptance

Check Credit Agency
Yes Customer ID Compute Credit
Score
Credit Score
No
Credit Score
Yes above Minimum?

No
Refer to Credit
Manager Customer Credit Request Evaluate Credit
Request
Credit Manager Response

Credit Manager
Approve?

Figure 12-8
Check Customer Credit Process

seasoned project managers agreed on the basic tasks that need to be performed to successfully
build and maintain information systems. These basic tasks are combined into phases of systems
development. As stated, SDLC rose to prominence when the U.S. Department of Defense re-
quired it on government contracts.
Different authors and organizations package the tasks into different numbers of phases.
Some organizations use an eight-phase process, others use a seven-phase process, and still oth-
ers use a five-phase process. In this book, we will use the following five-phase process:
1. Define System
2. Determine Requirements
3. Design System Components
4. Implement System
5. Maintain System