Management information systems revision question and answer

CPA-Quantitative-Analysis-Section-4 BLOCK RELEASE

There are four major change-over strategies that may be adopted during the implementation phase of information systems development process.

Recommend and justify the changeover strategies to be adopted for the following systems:
i) Electronic point of sale systems for chains of supermarkets countrywide.
ii) Secondary school admission system.
iii) Airline seat reservation system.

Change-over strategies
The four major change-over strategies are:
i) Direct change-over
ii) Parallel running
iii) Pilot tests
iv) Phased or staged implementation.

The following systems should be implemented using such changeover strategies as recommended below:
i) Electronic point of sale systems for chains of supermarkets countrywide.
For this system, I would recommend a phased or staged implementation. This is a method best suited to projects where distinct parts of the system are geographically dispersed. For example, the management may start first implementing the system in branches which are located in the capital cities followed those in major towns. This will guarantee a smooth change over without the need to recruit additional trained staff all at once. Existing staff are therefore given ample time to learn the new procedure well in hand way of familiarisation courses.
ii) Secondary school admission system
In this system, I would recommend the direct change over. This is a changeover method in which the old system is completely replaced the new system in one move. This method may be unavoidable in the case of a secondary school admission system because the old and the new system may be substantially different and parallel running is unrealistic. It is a cheap method and most appropriate for this situation, which mainly happens once in a year.
iii) Airtime seat reservation system
I would recommend the parallel running form of changeover. In this case, the old and the new system of seat reservation will be run in parallel for a period of time thus enabling cross checking to be made. In this case, the effectiveness of the new system will be known and its reliability made apparent.

This method is safer should there be problems with the new system as such it is better than the direct change over which might end up confusing the travellers.

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