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For administrative computer systems, there is logical flow to the development of a system that occurs over time within the context of a project.  The steps (phases) are not absolute.  It depends on the vision of the system to be implemented, the estimated scope of work and the assumed benefits to be derived.  In general, the steps below are progressive over time with the existing system as the starting point, expanding and incorporating additional functionality into a  newer, bigger, better system.

 

1. Feasibility Study

Feasibility studies are done only if we’re not sure that we have the resources or capacity to accomplish the development of a system or expansion of a system.   

 

2. Requirements Analysis

Most projects begin with this phase.  Generally speaking, the output consists of lists of the following:

a.      What we must have for a viable system to meet the main objectives

b.      What would be nice to have in this iteration of system development

c.       Blue sky – in our dreams system
 

3. Conceptual Design

This is a report that verbally describes the vision of the system that includes the existing system and the new elements of it.  It would incorporate all of a. what we must have; b. some of what would be nice to have if it can be incorporated without greatly increasing cost and scope of work; and c. those elements of blue sky that can be incorporated subject to the same constraints as b.
 

4. Physical Design

This is the blueprint for the system.  It includes the detail specifications for the work to be done, the schedule for when it is to be done and by whom it is to be done. 
 

5. Build/Implement

This is where the main body of work is done.  It’s an orchestration of the people, the tasks, the procurement, the testing, and the training.