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This paper presents M-Planning, a mobile tool to support collaborative planning, and its conjunction use with the IX Process Panels. M-Planning works like an intelligent mobile panel for agents on the move. The tool permits agents’ interaction, visualisation and manipulation of information related to collaborative processes of planning. The architecture of the M-Planning tool is integrated with the I-X System, and based on some of its concepts. The relevant I-X concepts for this work are discussed in the paper. M-Planning is intended to be used in real world domains and applications. To motivate and illustrate M-Planning use, a mixed initiative planning application is described in a fictitious scenario of disaster relief operations.