Page 27 - DCAP205_DCAP409_ANALYSIS_AND_DESIGN_OF_INFORMATION_SYSTEMS

Unit 1: Introduction to Information System Development

Whether the systems developer utilizes a process, data, or object-oriented strategy, the Notes
methodology concerning the strategy will be consistent and organized. Such a methodology is
termed here as “unified.”

1.5.2 Technique Approach

Methodologies are, certainly, compilations of connected techniques. Disaggregating most
methodologies consequences in recognizes techniques of unstable utility—some techniques
are exceptionally important, some are comparatively valuable, and some have only minor
value.

Example: A previous constituent of the structured techniques was the concept of a “Chief
Programmer Team.” Over the years, as it became obvious that this was not a victorious part of
the structured techniques, that concept was removed.
Due to this inconsistency in the value of constituent methods, there are those who utilize
collections of suitable techniques instead of unified methodologies.
With this approach, systems developers are taught in the utilization of “best of practice”
techniques recognized to have been victorious in resolving an enterprise’s troubles.
Self Assessment

Fill in the blanks:
13. Program ................................. is mainly concerned with writing of programs (coding),
editing of programs using a text editor or word processor, debugging and finally testing
them.
14. The foundation for the ................................. strategy is that application problems frequently
develop around real-world objects and the manners in which they interrelate.

1.6 Implementation

Implementation means to introduce the designed system into practice or in use. The
implementation process covers the following:

1. Acquisition of hardware and software resources required by the proposed system.
2. Develop the computer program or perform any modification in the existing programs or
the software package purchased.

3. Train the end user - it involves (a) preparing training program and documents that explain
how to operate the proposed system. i.e. to make manual of the Information System.
(b) Educate and train managers, sales person, computer operators who operate the system.
4. Test the system and remove errors if any. This process is continued till system is free from
errors.

5. Conversion process i.e. to introduce a new system.
The conversion process has many ways to convert from old system to new system.
A. Parallel: When new and old systems are run in parallel for a trial period and a comparison
of both is done. If the proposed system gives a satisfactory solution to information need,
it is accepted and the old one becomes obsolete.

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