Monitoring support device and monitoring support method

A monitoring support method characterized in that

• a monitoring support device has a control law storage section, a monitoring condition storage section, a plant control section, a monitoring necessity/non-necessity processing section and a monitoring condition learning section, wherein
• a control law that a suitable operation signal is put into correspondence with a process value that operation data of a plant component is measured is stored in the control law storage section,
• a monitoring condition that a monitoring degree which indicates a degree of necessity/non-necessity of monitoring is put into correspondence with a range of the process values is stored in the monitoring condition storage section,
• the plant control section obtains the operation signal which is to be output in accordance with the control law from the process value which is input and outputs it to the plant component;
• the monitoring necessity/non-necessity processing section obtains the monitoring degree which is to be output in accordance with the monitoring condition from the process value which is input and notifies a plant operator of it, and
• the monitoring condition learning section prepares the monitoring condition by putting the monitoring degree into correspondence with the range of the current process values on the basis of a probability of shifting from the current process value to the future process value when history data of the process value is input as learning data and makes the monitoring condition storage section store that monitoring condition.