Exception path
An exception path handles a deviation from the happy path — a validation failure, a missing input, an escalation, a customer dispute. Exception paths are necessary by design (some cases really are exceptional) but proliferate beyond design (workarounds that became permanent).
Healthy processes have a small number of well-designed exception paths and a large happy-path share. Unhealthy processes have dozens of exception paths, many of them invented in response to specific incidents and never retired. The audit move: enumerate exception paths, ask 'is this still needed?', and merge or eliminate the ones that exist only because of stale circumstances. Process mining helps because the long tail of variants is exactly the exception paths — sorted by frequency, the low-volume tail is full of candidates for elimination.
Related terms
- Happy path
The happy path is the variant of a process in which everything goes as intended — no exceptions, no rework, no manual interventions.
- Variant analysis
Variant analysis groups cases by the unique sequence of activities they followed and ranks variants by frequency and cost.
- Deviation analysis
Deviation analysis quantifies how often and how much an observed process diverges from its reference model — measuring missed steps, extra steps, out-of-order steps, and loops.