Glossary

Ex-ante simulation

Testing designed time thresholds against the real or observed distribution of cases before activating them.

Testing designed time thresholds against the real or observed distribution of cases before activating them. It is to temporal constraints what end-to-end testing is to trajectories: it avoids tuning service levels after the first breach.

Contrasting designed thresholds against the real distribution of cases usually reveals that the promised deadline only holds for the average case. The tail is where breaches live, and the average does not show it.

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Related terms

Bottleneck

The point in a process where available capacity limits overall throughput, producing waiting and case build-up.

End-to-end test

A full validation that traverses the process from the portal request through to the report, covering execution, service levels, notifications, closure and survey.

Threshold

The quantification of the tolerance allowed for a satisfaction criterion, with a target, a band and a direction (maximize, minimize or stay within range).