Standby Containers
A standby container can be used to represent items configured with standby redundancy. Standby redundancy configurations consist of items that are inactive and available to be called into service when/if the active item fails (i.e. on standby). A container block, with other blocks inside, is utilized to better achieve and streamline the representation and analysis of standby configurations. The container serves a dual purpose. The first purpose is to clearly delineate and define the standby relationships between the active unit(s) and standby unit(s). The second purpose is to serve as the manager of the switching process. For this purpose, the container can be defined with its own probabilities of successfully activating standby units when needed. Figure 1 includes a standby container with three items in standby configuration where one component is active while the other two components are idle. One block within the container must be operating or, because the container block is part of a series configuration, the system will fail.

Figure 1: Configuration with Standby Container

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