System Analysis And Design: System Analysis And Evaluation

SYSTEM ANALYSIS AND DESIGN

ANALYSIS

During this stage the systems analyst will investigate how the current system works and what needs to be improved. This involves finding out whether a new computer system is needed at all and exactly what it will be used for.

The basic steps in analysis stage are mentioned below

1. Fact finding / collecting data

2. Description of the existing solution

3. Identification of the problem in the current system

4. Making the objectives with the customer

5. Identifying and agreeing with the requirements

6. Interpreting the customer’s requirements

Fact finding you could include observation, questionnaire, and interviews and looking at the existing paper works

Observation – In this type of fact finding we monitoring the system on which we are working on.

Questionnaire – In this type of fact finding we distribute the questionnaire survey’s to check the problem faced by the company when they are using their original system.

Interview – In this type of fact finding we ask them questions individually to people and this source can provide you with better and more information.

DESIGN STAGE

Design stage is the key part of your recommended system. The list of task that should be covered by you is mentioned below.

• Designing data capture forms

• Designing screen layouts

• Designing output forms and reports

• Producing system flowcharts/ pseudo codes

• Selecting and designing validation rules

• Designing and agreeing on tables

• Selecting the required hardware and software

• Producing the algorithms

• Designing a testing strategy

Verifications

Verification is a way to prevent errors when data is copied from one medium to another. There are two commo...

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...dware and software requirements

12. Sample runs

13. Error handling

14. Tutorials

Technical documentation

It is designed to help the programmers and analysts who need to make improvements to the system/repair.

This consists of the following.

 Purpose of the system

 Programming codes

 Programming language used

 Flowcharts/algorithms

 Input formats

 Hardware and software requirements

 Minimum memory requirement

 List of variables used

 File structure

Evaluation

Once the system is up and running it is necessary to do some evaluation and carry out any maintenance, if necessary. The following list of some of the things considered when evaluating how well the new system works.

 Compare the final solution with the original requirements

 Identify any limitations in the system and any necessary changes that need to be made

 Evaluate the user’s response