For each of tasks performed in an operation of manufacturing equipment, a proficiency of a worker with respect to a task to be performed is obtained from a proficiency DB (120) storing proficiencies of workers with respect to the tasks. A guidance base time (314) determined based on a manufacturing schedule is controlled corresponding to the proficiency of the worker, a guidance control time (334) corresponding to the proficiency of the worker is determined, and guidance is outputted at the guidance control time (334). The proficiency of the worker with respect to the task is corrected based on task record information (340) including a task content and a task time of a task performed by the worker and on the guidance control time (334), and the proficiency of the worker with respect to the task stored in the proficiency DB (120) is updated.