Equipment Shift Assignment

Optionally assign one of the Site's Shift Calendars so OEE facts get tagged with the active shift for downstream slicing.

The Shifts tab on an Equipment selects one of the parent Site’s Shift Calendars and tags every OEE fact this equipment produces with that shift. The OEE engine itself calculates and stores facts regardless of whether a shift is assigned — the shift is metadata that lets downstream queries and dashboards filter or group results by shift.

The tab is intentionally minimal — shifts themselves are defined once per Site (see Site Shifts), and each equipment just picks one.

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Fields

Field	Required	Notes
Shift Assignment	Optional	Drop-down listing every Shift Calendar defined on the Site (Production, Office, Continuous, …). Pick exactly one if you want OEE results to be filterable by shift; leave unassigned if you don’t need the slicing.

The Site’s time zone is shown next to the heading so you don’t have to remember which zone the schedule is interpreted in.

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Read-only scheduler preview

Below the drop-down is a read-only scheduler showing the selected calendar’s shifts plus this equipment’s Planned Stops on top. This is purely a verification view — you can switch between Day / Week / Month / Timeline / Agenda using the toolbar, but you cannot create, edit or delete events here.

Equipment Shifts tab — the Shift Assignment drop-down selects the calendar; the read-only scheduler below shows the assigned calendar's shifts for verification

• To change a shift, edit it on the Site’s Shifts tab.

• To change a planned stop, switch to this equipment’s Planned Stops tab.

The combined view is useful for spotting:

• Planned stops that fall outside any shift (they have no effect — there’s no scheduled time for them to subtract from).

• Gaps in shift coverage where the equipment is expected to run but no shift is defined.

• Overlap between two calendars when reorganizing — assign the new calendar and verify the result before saving.

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What changes downstream

When the assignment is saved:

• New OEE facts the engine writes are stamped with the new shift’s id and metadata, so dashboards and queries pick up the change forward in time.

• Existing Planned Stops keep their absolute times — they don’t move with the calendar change. Verify the overlay still makes sense after a reassignment.

• Facts already stored against the previous calendar are not rewritten; the change applies forward only.

A common pattern is one Production calendar shared by every line in a plant, and a separate Continuous calendar (24/7) for buffers and storage equipment that doesn’t follow shifts. Equipment that doesn’t need shift-based slicing can also be left unassigned — OEE is still calculated, just without a shift tag on the facts.

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Validation

Condition	Behavior
Shift Assignment unset	Allowed. The engine still produces OEE facts; the shift fields on each fact are emitted as empty (ShiftId = empty GUID, ShiftDetails = {}).
Selected calendar has zero shifts defined	Allowed (useful for staging a calendar before populating it). Facts carry the calendar id but no shift events to filter on.
Selected calendar is deleted at the Site level	The dropdown shows the saved id without a label; reassign before saving any other change.

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Related

• Site Shifts — define the calendars and their shift events.

• Planned Stops — recurring downtime that subtracts from scheduled time inside the assigned shift.