A management system manages a computer system having a plurality of devices to be managed. A storage device of the management system stores one or more rules, plan information, and plan history information. A control device for the management system: identifies, on the basis of the one or more rules, a first cause event which is a candidate for a cause of an event which has occurred on one of the plurality of devices to be managed; identifies, on the basis of the plan information, a plurality of first plans which may be executed if the first cause event is the cause; calculates, on the basis of the plan history information, an index for each of the plurality of first plans which denotes the likelihood of succeeding in fault recovery if the plan is executed; and displays data denoting one or more of the plans among the plurality of first plans according to a display configuration which is determined on the basis of the index.