Abstract: An operation analysis method includes a first acquisition step, a second acquisition step, a plan designing step, and an analysis step. In the first acquisition step, the operation history of a washer is acquired. In the second acquisition step, at least the action schedule of a user of the washer is acquired. In the plan designing step, based on the operation history acquired in the first acquisition step, an operation plan for the future regarding the normal operation of the washer periodically performed by the user is designed. In the analysis step, based on the action schedule acquired in the second acquisition step, whether the operation of the washer is the normal operation is analyzed. In the plan designing step, the operation plan is updated based on the result of the analysis in analysis step.