Computing Center Management System (BC-CCM)

Time during which a system cannot be used for normal production operations due to unforeseen failure in hardware or software.

The source of unplanned downtime can be in any of the layers that make up the complete software and hardware environment, either singly or in combination. External events such as fire and flood can also lead to unplanned downtime. The cost to an organization of unplanned downtime is often very high.