The PLANNERS' WORKBENCH is a computer system to support the re-planning process. It records the rationale underlying a plan, that is, all of the assumptions, data, and arguments considered during the original planning episode. Using the rationale, the PLANNERS' WORKBENCH helps planners to comprehend the plan and its motivations, to validate the plan, and to analyze the effects of specific modifications during re-planning. Specific comprehension, validation, and analysis facilities are presented with illustrative protocols from two demonstration systems, DEMO and WAND.
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