Generation of Multiple Qualitatively Diierent Plan Options

Work is described which supports multi agent mixed initiative interaction between a task assignment or command agent and a planning agent Each agent maintains an agenda of outstanding tasks it is engaged in and uses a common representation of tasks plans processes and activities based on the notion that these are all constraints on behaviour Interaction be tween the agents uses an exchange of explicit task and option management information This frame work forms the basis for aWeb based demonstration of mixed initiative user system agents working together to mutually constrain task descriptions and alterna tive plans and to coordinate the task oriented genera tion re nement and enactment of those plans