Abstract
A preliminary investigation is a problem-solving procedure. The Ishikawa diagram illustrates the cause of the problem in a particular group of causes. Several studies have used Ishikawa diagrams in problem-solving procedures where the branches of the causes include some components of the information system. The purpose of this study is to conduct a preliminary investigation of information systems using Ishikawa diagram and sectoral statistics. This study uses the System Development Life Cycle method which is limited to preliminary investigation phase. This study has mapped all the components of the information system in the Ishikawa diagram as the branches of causes which grouped into 4M. Sectoral statistics determine the percentage of problems for each cause and category. Preliminary investigation produces several alternative solutions for clients/owners of sectoral statistics regarding categories and causes that have a percentage within the specified range. The percentages make determining the critical causes more measurable.
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