Schedule updating is a very important stage in continuing the management process of construction projects. Current schedule updating procedures utilize manual methods for gathering activity status information. These methods rely mainly on field reports that itemize the work in progress on a daily or weekly basis. To incorporate the progress data in the schedule, one needs to associate each work item and its progress information from the field report with one or more network activity. Work items specified in these reports are usually defined at a very detailed level compared to the more abstract level adopted in developing the activity network. This makes the updating process difficult and time consuming which discourages project managers from maintaining the schedule on a regular basis. This paper describes a conceptual model for direct acquisition of progress information necessary for schedule updating. The model will utilize computer aided design (CAD) capabilities coupled with pen-based computer technology. Network activities are automatically updated using translation tables. The tables link each work item and its progress data with one or more network activity.

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