Patent ID: 8442666

Claim:
A dynamic maintenance planning apparatus on a manufacturing system where a manufacturing apparatus is shared among a plurality of processes and a plurality of products are manufactured, the dynamic maintenance planning apparatus comprising at least one of a hardware processor and circuitry configured to effect: a maintenance plan generator configured to determine a maintenance date and time on and at which a throughput of a manufacturing system is maximum from among possible maintenance dates and times, based on a result of a simulation in which the manufacturing apparatus that is specific on the manufacturing system is stopped at a specified maintenance date and time; a completion-delayed-lot calculator configured to specify a lot whose completion is predicted to be delayed due to maintenance on the determined maintenance date and time; and a priority calculator configured to calculate a priority of the lot whose completion is predicted to be delayed, so as to prevent waiting time of the lot during maintenance; wherein the completion-delayed-lot calculator is configured to: create a simulation model where the manufacturing apparatus as a target will stop as scheduled, and a simulation model where the manufacturing apparatus as a target will not stop; create two progress plans for all lots based on each of the simulations during a specified period; and specify a lot whose completion will be delayed when maintenance is performed based on a difference between times in a completion process of the progress plans.