A work order is the unit of execution in any maintenance operation. It is the document that says: this person will do this job, on this asset, following these instructions, by this date.
In a paper-based shop, a work order is literally a printed sheet handed to a technician at the start of the day. In a CMMS, it is a record in the database with a status, an assignee, and references to everything related: the asset being serviced, the procedure to follow, the parts consumed, and the evidence captured during the work.
What a complete work order contains
- Identifier: a unique number for tracking and reference.
- Type: corrective (something broke), preventive (scheduled maintenance), inspection, calibration, etc.
- Asset(s): which equipment or location the work targets.
- Assignee(s): which technician(s) will execute it.
- Status: open, in progress, completed, on hold, cancelled.
- Priority: how urgent it is.
- Procedure: optional step-by-step instructions.
- Parts: items consumed from inventory.
- Evidence: photos, signatures, readings captured in the field.
- Timestamps: when it was created, started, paused, completed.
Why work orders matter
Without a work order, maintenance work happens but no one can answer basic questions afterward: who fixed it, when, what they replaced, what they noticed. With work orders, every job leaves a trail — which is what turns a maintenance team from a reactive cost center into a planned operation that can be measured and improved.
In a CMMS, work orders also become the connective tissue: they consume parts (linking to inventory), reference assets (linking to history), and roll up into reports (PM compliance, MTTR, backlog).