Preventive Maintenance Routine, sometimes called a Record or Request. It dictates the regular servicing schedule for shop machinery to catch wear before it causes a breakdown. Technicians follow these standard procedures to lubricate, calibrate, and inspect equipment at set intervals.
Heard on the job
Check the PMR on the big lathe, I think it's due for a spindle oil change this week.
Insider tip
Ignoring a PMR is the fastest way to turn a minor scheduled downtime into a major catastrophic failure.