Proposed SCC Metric: Criticality Measure in modeling scheduled outage

A novel procedure to compute service criticality level in a safety and business critical systems is presented. The presented “Service Composability Count (SCC)” procedure can be used to schedule the outage of services, according to their criticality level. This SCC plays an important role in modelling planned outage, as continuous availability of some critical services is highly desirable in service-based systems (SBS). This paper focuses on accurately scheduling the outage on the basis of service criticality. Results indicate that highly composable services are critical, whereas atomic services are very less critical. That means, while scheduling the outage of services for maintenance purposes -Atomic services should be scheduled first while composable services should be scheduled at last.