Abstract
In maintenance and operation of information system, it is extremely difficult to crimp troubles occurred completely. Program developers and maintenance operators have modified cause in case of trouble, and have improved feedback on review, however, mistakes and troubles have still occurred. Besides, we have gone to a great deal of trouble to post handling and explaining to client. On the other hand, as for electricity industry, building field, transportation facilities and medical care facilities, those industry have obviously developed provision against preventive provision and preventive measures such as drawing up highly accurate work procedure, because if trouble happens, most of cases would lead to cause a serious accident involving human lives. In a operation section a writer belongs to, we have caught up "Time-Series Thinking Framework" which is the method to analyze time-series operation procedure and seek a cause of trouble. It was devised by other industry. In maintenance and operation of information system, we introduce a case applied the chronological thinking framework as consideration for preventive measures of trouble and improvement in the chronological thinking framework in this paper.
