Patent ID: 9442784
Filing Date: 2016-09-13
CPC Classification: G06F

Claim Text:
1. A management device, comprising: a node information storing unit which stores, for each of plural operation devices, an device state representing whether an operation device is in a working state in which the operation device is working or in a non-working state in which the operation device is not working, the device state associated with an identifier of the operation device; a fault state acquiring unit which acquires a value representing whether or not a fault exists from each of the operation devices that are in the non-working state; and an instruction unit which sends, when a number of the operation devices is smaller than a predetermined value, a work instruction to the operation device from which the value representing that no fault exists is acquired and which is in the non-working state, among the plural operation devices which make a transition to the working state when receiving the work instruction while in the non-working state, wherein the fault state acquiring unit sends an inquiry about whether the fault exists or not to the operation device at a predetermined time intervals to acquire the value representing whether or not the fault of the operation device exists, and the operation device in the non-working state makes a transition to the working state when a prefixed time have passed since the last inquiry.