What is industrial maintenance is a question with a short answer and a long one. The short answer: keeping a plant's equipment running, safely, at the cost the operation can bear. The long answer is the work itself, what is maintenance work in the sense of the tasks, what do maintenance workers do between the start of a shift and the end, and what performing maintenance well involves beyond turning a wrench. This page gives the long answer for somebody joining the function, managing it for the first time, or deciding what to buy for it.
The kinds of work
Preventive: tasks done on a schedule to stop failures, from a daily inspection to an annual overhaul. Corrective: repairs of faults found by inspection before the asset has failed. Reactive: repairs of failures, the breakdown calls. Improvement: changes that remove a recurring fault. And compliance: the inspections and tests the law or the insurer requires, with their records. A plant's maintenance is the mix of those five, and the mix is the single most telling thing about how it is run.
What maintenance workers do in a shift
Read the day's work orders and the overnight breakdowns. Take the reactive calls as they come, with lockout before touching anything. Do the scheduled tasks between calls: inspect, lubricate, adjust, replace. Record what was found on each job, because the next shift and the next year depend on it. Hand over what is open. A technician's day on a well-run site is mostly scheduled work interrupted by calls; on a badly-run one it is calls interrupted by nothing.
Performing maintenance well
Doing the scheduled work when it is due rather than when it is convenient. Recording findings rather than ticking boxes. Reading the history before opening a machine. Raising a corrective work order for what an inspection finds instead of fixing it silently. Following the lockout procedure every time, which is the part of the job the law is most specific about. None of that needs software; all of it is easier with a record that everyone reads.
What separates a well-run function from a busy one
The reactive share. A function that is busy because most of its work is breakdowns is running behind the equipment; one whose work is mostly scheduled is ahead of it. This site's worked example, 240 work orders a month with 35% reactive, is a function in between, and the arithmetic on that page is what moving the share is worth. The maintenance log worksheet is the record a small team keeps to find out its own share.
Questions people ask about what is industrial maintenance
Is industrial maintenance a trade?
It employs several: mechanical, electrical, instrumentation, and the multi-skilled technician who covers the routine work across them. The function is the organisation those trades work in.
What qualifications do maintenance workers need?
A trade qualification for the technical work, and the site's own training for lockout, permits and the equipment. CMMS experience is asked for on most job ads and is the record-keeping part.
What is the difference between maintenance and repair?
Repair is one kind of maintenance, the reactive kind. Maintenance includes the scheduled work that makes repair rarer.
Who does industrial maintenance report to?
Usually operations or engineering. The reporting line matters less than whether the function owns its schedule and its record.