Title:	IS/IT INVESTMENT APPRAISALS: PRIOR-IMPLEMENTATION AND POST-IMPLEMENTATION EVALUATION: THE GAP IN THE SYSTEMS’ COSTS
Author(s):	Hussein Al-yaseen
ISBN:	972-99353-6-X
Editors:	Nuno Guimarães and Pedro Isaías
Year:	2005
Edition:	2
Keywords:	Prior Operational Use, Operational Use evaluation, Costs, Gap, IS/IT investment appraisal.
Type:	Short Paper
First Page:	224
Last Page:	230
Language:	English
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Paper Abstract:	This paper reports the views of IS/IT managers about IS/IT evaluation types Prior Operational Use and Operational Use evaluation. The purpose of this study is to document the current state of practice IS/IT evaluation types. Specifically, it attempts to answer the following specific questions: what are the main costs criteria of Prior Operational Use and Operational Use evaluation? What are the main reasons of adopting a comparison between the costs outcomes between Prior Operational Use and Operational Use evaluation? What are the main reasons of the gap between Prior Operational Use and Operational Use evaluation? A questionnaire was used to gather data for this study; 123 usable responses were obtained from a sample of top 500 organisations in the UK with a response rate of 24.6% makes the results generalisable with confidence for medium to large organisations. Results indicate that most organisations who carried out a formal Operational Use evaluation adopted a comparison between the outcomes in terms of systems costs of Prior Operational Use and Operational Use evaluation. Most found a gap when adopting a comparison. The gap included the side in estimating systems’ costs. The main reasons for the gap between Prior Operational Use and Operational Use evaluation are: changing of the requirements in terms of (users, system, and market); limitations in evaluation methods used, and unavailability of experienced evaluators. Although Operational Use Evaluation did not attract much attention in the past, a structured approach to it proved to be able to provide extra benefits to organisations when implementing new systems. Operational Use Evaluation enabled the organisations to verify whether the system met its business objectives and to improve their evaluation techniques at the development and/or the operational use stage of the new system.
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