7.2 Multi‐Phase System
The section presents explicit and implicit methods for reliability analysis of multi‐phase systems (also known as phased‐mission systems [PMSs]) subject to PCCFs caused by external shocks or factors. The PMS considered can be subject to more than one external CC happening in one phase or multiple different phases. Different CCs are s‐independent. The local failure event of a component and its failure event(s) caused by external CC(s) within each phase are also s‐independent.
Assume there are m phases and Li CCs (denoted by
7.2.1 Explicit Method
Similar to the explicit method for single‐phase systems (Section 7.1.1 ), the explicit method for PMSs involves constructing and evaluating an expanded system model where each CC is modeled as a basic...