EAM.6:11 - SoTA-Echoing

For a named outage, first use OPS.10’s qualified capacity/service reasoning and an applicable supply or duration bound. The constructed 400 m³ buffer and 200 m³/h deficit establish a two-hour limit, sufficient to reject the three-hour proposal.

IAM Anatomy v4, §7.5.6, pp. 66–67, relates disturbance to the extent and duration of service loss and recovery objectives. GFMAM Landscape v3, §3.9, distinguishes asset and organizational resilience. The dependency and recovery construction above adapts those concerns to an asset choice: the shared feeder removes two contributions, and the time at which independent supply becomes usable changes the answer. More normal capacity alone does not resolve either fact.

For consequential water-network relationships, extended-period hydraulic analysis is a stronger alternative. The US EPA’s EPANET capabilities and hydraulic modeling description covers pressure, flow, tank levels and controls. Obtain such a result when deliverability or changing network behavior remains unqualified. Reuse an applicable existing result where available.

A supported simple bound is enough for the failed-duration question; dependency and interval reasoning is needed for the shared-loss question. Neither substitutes for an unresolved hydraulic relationship or failure-probability estimate. Reopen the choice of method when controls, demand, reserve delivery or restoration conditions change the answer beyond the current model’s reach.