Fault Tree Analysis Primary-Secondary-Command

If all potential secondary and command failures for all components in this very simple system were analyzed in depth, even this effort could take on new dimensions. As a matter of fact, even the primary failure of a light bulb, shown in the example as a base event, could actually be expanded several more tiers if the light bulb were broken down into individual components. How tedious and time-consuming detailed fault tree analysis on complex systems can become can be readily appreciated. 

This fault tree analysis (FTA) of the wet pipe sprinkler system for the building at, , outlines the primary, secondary, and command failures of the system that would prevent it from extinguishing a fire in the facility. 

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