Rule catalogue · Shift patterns

Nobody is given two shifts on the same day

Breaking it assigns the same person two shifts on one calendar day, which is a roster nobody can actually work.

Applies: when the month's roster is built
Enforcement: Hard or soft, set per organisation
Who sets it: An administrator in your instance
Family: Shift patterns
Roster style: no-rotation (day-by-day)

configuredCompiled from the product source on 12 September 2026

What shift patterns rules protect

Many units roster on a repeating pattern, and the pattern itself encodes decades of accumulated practice about what sequences are survivable. These rules keep a generated roster inside the shape the unit actually works, including the direction of rotation, which affects fatigue more than most people outside operations expect. Where a unit rosters without a pattern, this family is largely switched off, which is itself a configuration choice.

Other rules in this family

A run of duties is long enough to be worth it
A pattern block is worked as fully as it can be
Pattern rosters keep a minimum run of working days
Nobody works two pattern blocks on the same day
Pattern blocks for one person never overlap in time
Position sequences the unit bans do not appear
Nobody is on two positions at the same time
Controllers are not moved between sectors needlessly

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