Approaches to development of I.S.

20 Feb

I found a table of various approaches to developing Information Systems that some of you might like, breaks it down to basic points. 

 

Approach

What?

When?

Why?

Why not?

SDLC

Building the system by completing 6 stages sequentially:

1. Project Definition

2.Systems Study

3.Design

4.Programming

5. Installation

6.Post-implementation

Medium to large mainframe-based systems

1.Structured

2.Formal

1.Time consuming

2.Costly

3.Inflexible

Prototyping

Building an experimental system quickly and cheaply

Unclear user requirements

1.User involvement

2.Fast

1.Poor system quality

2.Lack of standard

Packages

Purchasing programs that have been written and tested

Common system solution

1.Limited technical skills

2.Cost saving

3.Clear expectations

1.Not meeting all needs

2.Customization

End-user Development

Building the system by end-users with little or no formal technical assistance

Personal & small applications

1.No misunderstanding

2.Fast

1.Limited scope

2.Loss of control

Outsourcing

Using an external vendor to develop or operate an organization’s ISs

Mission non-critical applications

1.Reduce costs

2.Predictability

1.Risky

2.Loss of control

Also a diagram of some of the approaches:🙂

 Hope ye find these helpful!

Sources: https://www.uky.edu/~dsianita/320/ch4.html

 

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