This type of analysis proves to be quite helpful in

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: to the new system takes place incrementally over a period of time. The new system is gradually implemented part by part and the old system is gradually phased out. The results produced by each part of the new system are compared against the results of the old system. Any discrepancies or errors found are checked and removed. Once confidence is developed in a particular part of the new system, that part of the new system is phased in and the corresponding part (operations) of the old system is phased out. This approach is continued for each and every part of the new system. Thus, over a period of time, the new system is gradually phased in, while the old system is gradually phased out. This method is not as expensive as the parallel run method because the changeover process being gradual can usually be handled with existing manpower. Moreover, there is no danger of interruption of work if there are problems with the new system because the corresponding part of the old system is still in operation. The users also get sufficient time to become acquainted with the new system. Hence, they can confidently handle the new system when the complete system is handed over to them. This method, however, cannot be used in situations where the time period supplied for conversion process is very less or when the new system significantly differs from the old system. SYSTEM EVALUATION Once the new system is implemented and put in operation, it is necessary to evaluate the system to verify whether or not it is meeting its objectives. These objectives of the system are clearly stated during its problem analysis and system planning phase. The post implementation system evaluation is normally carried out by people who have an independent view point and are not responsible for the development and maintenance of the system. While evaluating a system, the following points are normally considered: 1. Performance Evaluation. The performance of the new system is evaluated and compared with the performance of the old system. In general, the new system should be at least as efficient as the old one in performance. In case of any slack, the re...
View Full Document

This document was uploaded on 04/07/2014.

Ask a homework question - tutors are online