In order to improve the efficiency of any business, it is now very important to reuse knowledge by accumulating it in a computer. We propose a method that accumulates and reuses knowledge of work by automatically extracting it from a user's operation records during ordinary use on a Personal Information Management system (PIM). We assume that related work events on the PIM are input and referred to consecutively by the user. Our method that extracts available knowledge constructs a workflow by grouping all related events and detecting milestones based on the time and order of operating target events. Usually, reference to events is the user's viewing of events on the calendar without involving operations, so recording a target event and time of reference is difficult. In order to record the user's reference behavior exactly, we introduce a balloon-help-based function for event reference support.

In businesses, knowledge of work is represented by a sequence of related work events and management of these relations is very important for users. This paper proposes a method that automatically groups related work events from user's operation record on a Personal Information Management system(PIM). We assume that the related work events on a PIM are operated consecutively by a user. Our method accumulates the target event and time of the user's operations such as inputs, changes, and references, and picks out all related events based on their recorded operation time. However, reference to events is an act that a user just looks at an event on a calendar view, not involving any operation, so recording which event and what time the user referred is difficult. In order to record the user's reference behavior exactly, we introduce a balloon-help-based function for event reference support. We ran a one-month trial of our developing prototype and confirmed our method can group related work events with acceptable accuracy.

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This paper proposes a method to automatically organize and visualize related work events as a work-project structure. This is accomplished by accumulating and analyzing the target event and time of the user's operations such as registrations and references on a Personal Information Management system (PIM). Our processes for organization are : (1) extracting relations between events from the records of user's reference operations using balloon-help function, (2) intensifying the relations between events during interaction with the user by visualizing the relations and presenting them to the user, (3) making connections between events based on the extracted relations. Our visualization method represents the organized work events as connected graphs in which nodes and arcs indicate events and relations between events, and in which the intensity of the relation is represented with arcs of width in proportionto the intensity. Furthermore, in order to visualize a structure of collaboration among several users, our visualization method places each user's connected graph on the side planes of a three-dimensional multi-angular prism.