How to Build a Preventive Maintenance Schedule for Equipment

Maintenance schedules tend to die the same way.

Somebody builds a thorough one. It generates more work than the team can get through. People fall behind. Within a couple of quarters everyone's ignoring it — including the handful of items that genuinely mattered, which are now buried under two hundred that didn't.

A short schedule people finish beats a thorough one they don't. That's the whole argument. The rest of this is how to decide what stays on it, and which intervals aren't yours to choose.

What belongs on a schedule

Three tests. An item qualifies if it passes any of them.

Equipment that fails cheaply, predictably and without consequence doesn't need a schedule. Fix it when it breaks and spend the attention elsewhere. The office stapler is not a maintenance programme.

Intervals set by regulation

Statutory intervals are not yours to choose. Take them from the rule and treat them as fixed. A few of the common ones:

The forklift rule is quoted directly in 29 CFR 1910.178: trucks 'shall be examined before being placed in service' and 'such examination shall be made at least daily'. OSHA has also said in an interpretation letter that the standard does not require those examinations to be documented — but an undocumented check is hard to prove afterwards, so most operators keep a checklist anyway. Fall-arrest equipment must be 'inspected prior to each use for wear, damage and other deterioration' under 29 CFR 1926.502. Extinguisher intervals and record-keeping are in 29 CFR 1910.157.

In the UK, HSE's guidance on thorough examination of lifting equipment sets the 6- and 12-month LOLER intervals, with an examination scheme drawn up by a competent person as the alternative. For other work equipment, HSE's PUWER inspection guidance says the frequency 'should be determined through risk assessment', that the result should be recorded and kept 'at least until the next inspection', and that equipment leaving your premises or arriving from a hire company should carry physical evidence of its last inspection — a report, tag or label.

Portable appliance testing: no annual rule

PAT testing is where the most money is wasted on intervals nobody required. HSE states plainly that the regulations don't make inspection or testing of electrical appliances a legal requirement, 'nor do they make it a legal requirement to undertake this annually' (HSE PAT FAQs). What the law requires is that equipment is maintained to prevent danger; the interval is yours to set by risk.

HSE's leaflet for offices and other low-risk environments gives suggested starting intervals (HSE INDG236):

Construction sites, workshops and hire fleets are higher risk and justify shorter intervals than these. The point is that 'every year, everything' is a habit, not a legal duty.

For more equipment types, including vehicles, HVAC and IT hardware, see preventive maintenance intervals by equipment type.

Setting everything else on evidence

For equipment no regulation covers, start from the manufacturer and adjust.

• Manufacturer intervals are a starting point. They're usually written for heavy duty, so they're often conservative for light users and occasionally optimistic for heavy ones.
• Usage matters more than calendar time for anything that runs. An item used daily and one used monthly should not share an interval.
• Adjust on evidence, one direction at a time. Change one interval, run it for a few cycles, then look again.

Record why an interval changed, on the plan. In two years nobody will remember, and an unexplained interval gets reverted by whoever inherits it.

What to record against each scheduled item

• The asset, by tag — not 'the forklifts', but each one, because each one has its own due date.
• The task and its source — statutory, manufacturer or internal — so nobody lengthens a legal interval by accident.
• The interval, in days or in usage, and the date it was last changed and why.
• The owner, by name, and who does the work: in-house or a named contractor.
• The lead time, so the work is raised early enough to book.
• The result of each visit: pass, fail, defects found, cost, and the report or certificate attached.

A small schedule, as an example

Hypothetical, for a UK workshop with a US sister site. The statutory rows come from the rules above; the rest are illustrative starting points to adjust on evidence.

Raise the work before the date, not on it

A schedule that surfaces work on the day it's due has already failed, because parts need ordering, engineers need booking, and the item needs taking out of service without wrecking somebody's week.

Raising the ticket ahead of the due date turns maintenance from an interruption into something plannable. How far ahead depends on the lead time — a week for an internal check, considerably longer for a specialist visit or a LOLER examination booked with an outside competent person.

*Servicing and cover held against the asset, with renewals and inspections warned ahead of the date rather than on it.*

Statutory inspections deserve separate handling

Servicing is an efficiency. Statutory inspection is a legal duty with an evidence requirement, and the consequence of a lapse isn't a broken tool but a stopped job, a failed audit or worse.

1. The reminder fires early enough to arrange a competent person, not on the expiry date.
2. The result is recorded against the asset, not filed separately, so the evidence is where the equipment is.
3. Out-of-date equipment cannot be issued. A system that will happily hand out a harness past its inspection has automated the wrong thing.

Who does the work, and who chases it

Schedules decay when ownership is ambiguous, and ambiguity is the default state. Each scheduled item needs a named owner — the person who does it or arranges it — and an escalation when it goes overdue.

In a small organisation that's one person for everything, which is fine as long as it's written down. The failure is assuming that because the schedule is visible to everyone, somebody is watching it. Visible isn't the same as owned.

Keeping equipment out of service while work is open

The control that matters most and gets implemented least.

An item with an open maintenance ticket, or one past a statutory inspection date, shouldn't be issuable or bookable. Not flagged — blocked. A warning that can be clicked through will be clicked through at seven in the morning when a crew is waiting.

It also settles the argument about whether servicing is worth the disruption, because the disruption becomes visible in the booking calendar rather than arriving as a surprise on the day. In Stackroom, for instance, maintenance plans raise tickets ahead of the date and an asset in maintenance can't be checked out; more on that on the maintenance and warranty page.

Measuring whether it's working

If the completion rate is persistently low, the schedule is too large rather than the team too slow. Cut it back to the items that pass the three tests, keep every statutory item, and rebuild from there.

Sources

• 29 CFR 1910.178, Powered industrial trucks — OSHA
• Powered industrial truck examinations do not have to be documented — OSHA interpretation letter, 2000
• 29 CFR 1926.502, Fall protection systems criteria and practices — OSHA
• 29 CFR 1910.157, Portable fire extinguishers — OSHA
• Thorough examinations and inspections of lifting equipment — Health and Safety Executive
• Inspection of work equipment (PUWER) — Health and Safety Executive
• Portable appliance testing FAQs — Health and Safety Executive
• INDG236, Maintaining portable electrical equipment in low-risk environments — Health and Safety Executive