Monitoring of a system

摘要

A method of monitoring a system, includes determining the values of a number of parameters of equipment comprising the system. The values when the parameters become abnormal and when they become normal are determined. Those parameters that become abnormal and those parameters which were abnormal and become normal and the times at which these events occurred are recorded. The parameters are grouped in a plurality of different categories. The number of abnormal parameters in each category in a predetermined time interval is summarized. The number of abnormal parameters in each category in each time interval is displayed for a predetermined time window. The invention also extends to an arrangement for monitoring a system.