Lesson 12 B Introduction to Computers Systems Development
Lesson 12 B Introduction to Computers
Systems Development Life Cycle (SDLC) SDLC is an organized way to build an information system home
The SDLC is a Series of Five Phases Needs analysis Systems design Development Implementation Maintenance home
Needs Analysis Phase Defining the problem and deciding whether to proceed Analyzing the current system in depth and developing possible solutions to the problem Selecting the best solution and defining its function home
Several Ways to Document Problem or System Data flow diagram Structured English Decision tree home
Systems Design Phase The project team tackles the “how” of the selected solution home
Examples of Answering the “How” Top-down design Bottom-up design home
System Design Tools Working models, called prototypes Computer-aided software engineering (CASE) tools home
Development Phase The programmers create or customize the software for the various parts of the system home
Two Alternative Development Phase Paths Acquisition Local development home
Implementation Phase The project team installs the hardware and software home
Conversion The process of moving from an old computer system to a new one home
Conversion Methods Direct Parallel Phased Pilot home
Maintenance Phase IS professionals continue to provide support after the information systems are implemented home
Lesson 12 B Building Information Systems
Review Questions What is SDLC? What are the five SDLC phases? What are the possible development phase paths? What is conversion? home
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