5. Conclusions
Choompol Boonmee and Tawa Khampachua
In this paper we illustrate that generally software has been designed to fit requirements of service provisions for wide circumstances. It covers all data entries required. However it is hard to satisfy all users’ needs with different experiences, cultures, environments and resources. Presently deployed software is effective only for some users under some situations but does not fit all. This matter becomes an important limitation in widely spread software utilization and maximizing benefits from ICT investment. Mostly deployed software systems are web page applications. This research focuses on contextualization of the legacy web based application’ s data entry to maximize benefits under various contexts of use. In order to contextualize software to fit various contexts, the software modification is required. However modifying legacy web application on server side is difficult due to many reasons; poor documentation, poor source code management, personalized scripting difficulty and etc. In this paper we propose a technique of client side web page modification to customize data entry to fit various contexts and to maximize benefit from legacy web page software. Instead of modifying the whole old program which requires complete understanding and complete source code, this method allows modification only a few specific web pages that need to be contextualized without or very little side effects to the legacy software. Since less effort is required and multiple developments can be done simultaneously, it can be performed easier, faster and cheaper. Experiments have been performed with Thai government legacy web applications. The result indicates that by using this method, benefits from legacy web applications can be maximized significantly without modification of web server. The increased benefits in the experiments are the efficiency and effectiveness of data entry process under various contexts of use. However since the main idea is to filter and modify web page content on the fly at client side without modification of web server, issues that should be studied further include security, complexity of legacy software and etc. There are some apparent disadvantages of this technique. One of them is that this method is appropriate only in case of simple modification is required. By using this technique the software is modified in presentation layer or in html level. It is hard to be used when complicated modification is required. Additionally after using the technique in software contextualization, the later modification of the central web server application affects all the contextualized software since they all depend on existing application especially in presentation layer. These disadvantages need to be studied further in the future.
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