Multiple Redundant, Independent, Backup Systems — developed at Impell for nuclear safety software, applied to everything since
This is Jonathan Hare's account, with its provenance shown. The person or organization named has not yet claimed or corrected it.
MR-DIBS — Multiple Redundant, Independent, Backup Systems — is the resiliency criterion Jonathan Hare developed at Impell Corporation, writing software to manage and assess safety systems for nuclear power plants (Impell being a unit of Combustion Engineering, later acquired by ABB in Zurich, where the friendships continued). The test: no single failure should be able to take the system down, because every critical function has independent, redundant backing. By late 2000, Consilient looked like it passed — multiple blue-chip customers, multiple partnership tracks, multiple competing term sheets, multiple banking relationships. Hare's own retrospective verdict on the confidence this produced is preserved verbatim in the source record: he became convinced, in the era's phrase, that his shit no longer stank.
The instructive part is what the criterion missed, and the record states it because the architecture is built on the lesson: every one of Consilient's redundant systems was independently exposed to the same environment. When the bubble burst and 9/11 followed, the customers cut budgets together, the term sheets evaporated together, and the banks retrenched together. Redundancy within a correlated environment is not redundancy — a truth nuclear engineering states as common-cause failure, and the reason the Quantum Privacy Network's resilience story is built on structural independence at the substrate, not on counting backups that share a sky.
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