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 by first implementing the system in branches which are located in the capital cities followed by 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 by 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 by 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.
Wilfykil answered the question on March 1, 2019 at 09:35
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