In response to the need for liberalization and the stable supply of energy, energy supply
systems have been diversified and many options are now available. On the other hand, the prompt
proposal and evaluation of large-scale energy supply systems consisting of various pieces of
energy equipment and related operating procedures has become difficult. Mitsubishi Heavy
Industries, Ltd. (MHI) is working on the development of a platform for offering a total energy
solution that realizes efficient energy utilization under normal circumstances and ensures business
continuity in times of emergency such as power outages or equipment failure. This paper describes
an overview, applications, and the future development of the planning system, which is a part of the
platform.