Preventive Maintenance (PPM) vs. Breakdown Maintenance — The Practical Guide for the Office Building Manager

Every office building manager knows the two approaches. The first: wait for something to break, and then pick up the phone to a contractor. The second: there is an orderly preventive-maintenance schedule — a PPM program — in which every system in the building has an inspection date, a responsible party and a fixed frequency, before it even has a chance to break down. The difference between the two is not a matter of order — it is the difference between a building that is managed and a building that reacts, and ultimately between a tenant who renews a lease and a tenant who looks for another tower.

I have worked with buildings that moved from a breakdown-maintenance regime to a full PPM regime. The most notable change was not fewer faults — although that happens too — but a change in the conversation with tenants. Instead of conversations about what broke, the conversations are about what is planned. That is a difference you can feel.

Two approaches, two entirely different economies

Breakdown (reactive) maintenance sounds economical: you don't pay for an inspection that might be unnecessary, and you deal only with what actually breaks. In practice it is an economic illusion. When a system fails without warning, you do not choose the timing of the treatment, the vendor or the extent of the damage — all are forced upon you. An emergency call at an hour when no parts are available, a motor that burns out because overheating went undetected, a leak discovered only when it has already reached the floor below — all of these are far heavier than the inspection that would have prevented them.

Preventive maintenance (PPM — Planned Preventive Maintenance) flips the equation. Instead of reacting to an event, you schedule an action. The equipment is inspected on a fixed cycle, consumable components are replaced by operating hours rather than by failure, and faults are identified while they are still small and still cheap. The result is not only fewer faults — it is budgetary and operational control.

In breakdown maintenance you do not choose when, how and how much — the system chooses for you. In PPM, you are the one holding the schedule.

The critical economic distinction is not the cost of the treatment itself but the cost of surprise: a contractor arriving on an emergency charges a premium; spare parts ordered in haste cost more; and a building shut down for a day causes reputational damage that appears on no invoice but is felt when it is time to renew a lease.

How to build a PPM schedule: the two sources of truth

A good PPM schedule does not rely on gut feeling or on "what we've always done here". It is built from a combination of two binding sources, and for every system in the building both must be examined.

1. The manufacturer's instructions — the operational floor

Every substantial piece of equipment — a chiller, a cooling tower, a generator, an elevator, a main electrical panel, pumps, UPS systems — comes with a manufacturer's maintenance manual that defines clear intervals: when to check pressures, when to replace oil, filters or drive belts, when to calibrate. These are not recommendations — they are the warranty conditions.

In practice, when a chiller drops out in the middle of a heat wave and a tenant's lawyer asks whether periodic maintenance was performed per the manufacturer's instructions — you want the answer to be "yes, documented". If not — the manufacturer's warranty comes off the table and your liability toward the tenant lands on top of it.

2. The Israeli standard and law — the legal floor

Some of the building's systems are required to undergo periodic inspection by virtue of Israeli law, and are not subject to the building manager's discretion:

• Elevators: a periodic inspection by a certified inspector on behalf of the Standards Institution of Israel, under the Safety at Work Ordinance [New Version] and the Safety at Work (Elevators) regulations. The inspection frequency is set according to the elevator's age and type.
• Fire detection and suppression systems: examination under Israeli Standard SI 1220, in coordination with Fire and Rescue Israel. Sprinkler systems, detectors and manual suppression means are inspected at different frequencies.
• Electrical installations: periodic inspections by a certified electrician under the electricity regulations and the occupational safety regulations; including the main panel, the grounding system, and the sub-panels.
• Lifting equipment and work at height: subject to the Safety at Work Ordinance and requiring a periodic inspection by a certified inspector.
• Pressure vessels and boilers: if present in the building, subject to the Safety at Work (Pressure Vessels) regulations.

A real PPM schedule slots these statutory inspections as fixed events with a target date — and not as something you remember when a letter arrives from the authority. The authority enforces; the fines and civil liability for non-compliance are not a theoretical matter.

The guiding rule: take the stricter of the two

Between the two sources — the manufacturer sets the operational floor, the standard sets the legal floor. You take the stricter frequency of the two — and that is what enters the schedule. If the manufacturer says every six months and the standard requires every year — you inspect every six months.

What goes into each frequency — the schedule layers

A PPM schedule is organized in layers by frequency. The most common and workable breakdown in an Israeli office building looks like this:

The guiding rule is simple: the cheaper and quicker the action, the higher the frequency at which it is performed — because it is the net that catches problems before they develop into an expensive incident. A weekly visual round in the machine room that catches a small leak is worth more than a deep annual inspection that arrives two months too late.

The small failure you didn't treat — the most expensive of all

This is the point that brings down the breakdown-maintenance approach. The truly expensive failure is almost never the dramatic one — it is the small failure you postponed, because the building "still works".

The chiller that works "a bit harder"

A chiller with a dirty condenser or a low refrigerant level will keep cooling — but will work harder, consume more electricity and heat up. The months it is dragged along in this state are months of accelerated wear on the compressor, which is one of the most expensive components to replace in the whole building. A quarterly inspection round would have caught this while the treatment was still cheap.

Without the round, the first sign you'll get is a service request from a tenant complaining that it is hot in the office in the middle of an August heat wave — and by then it is too late. The HVAC station will be short-staffed and the technicians' schedule will be full. The building will sit with a problem for days.

The elevator making a noise

A new noise, an imprecise stop at a floor, a door that closes aggressively — these are not "features", they are early warnings. An elevator shut down without planning disables traffic throughout the building, harms all the tenants simultaneously, and produces exactly the kind of incident that is etched in the memory of a tenant weighing renewal.

The elevator's statutory periodic inspection is not only a legal obligation — it is an operational tool that prevents the shutdown. In addition, calling a certified inspector after an elevator has gone two years without inspection may result in a demand for an immediate shutdown until the inspection is carried out. This is not a theoretical scenario.

What a "hidden cost" is and where it hides

A hidden cost is a cost that does not appear as a defined line in the budget, but hides in several places:

• Unnecessary energy consumption — equipment not operating at its correct COP consumes more with no change in performance.
• Shortened equipment lifespan — accelerated wear shortens the replacement cycle from 20 years to 12 years; that is a huge budgetary difference.
• Emergency premium — a contractor arriving outside working hours charges a significant surcharge for the callout.
• Erosion of tenant satisfaction — hard to measure, but anyone who has heard a tenant say "something's always not working here" knows what it is worth at renewal time.

A PPM program is the mechanism that brings this cost out of the dark and onto the schedule — to a place where it can be planned and priced.

The working method: inspection rounds by floor and by system

A PPM schedule is only as good as its execution. The common problem is that the program exists on paper but the inspections in the field are performed partially, without documentation, and without anyone knowing what was actually inspected this week. The way we at Domera manage this is through structured inspection rounds — cut along two complementary axes.

Round by floor — the physical coverage

The maintenance worker goes floor by floor and works according to the list of assets assigned to that floor: air-conditioning blowers, light fixtures, fire hydrants, smoke detectors, sub-panels. The logic is simple and physical — you don't return twice to the same place, and every asset on the floor is marked as inspected before moving on. This is the round that ensures no floor is left "out".

Round by system — the engineering logic

Here the logic is engineering rather than geographic: you inspect a whole system end to end — the entire air-conditioning system, or the whole suppression array — from bottom to top, from the source to the last point. This round catches problems that a floor round misses, because a fault in a system usually manifests in one place but originates in another. Low pressure on floor 8 can stem from a fault in a valve on floor 2 that a floor round simply will not catch in the correct order.

What happens when a deficiency is found

Every round is saved cumulatively — you can stop midway and continue without losing your position, and every item is documented. When a deficiency is discovered it immediately becomes one of two things:

• A service request (SR) for immediate repair — if the deficiency requires technical intervention now.
• A recommendation for the next round — if the deficiency is a deterioration in its early stage that can be planned for.

The failure is not "seen and forgotten" — it enters a queue with a responsible party and a date. That is the difference between a maintenance list and a maintenance system.

Checklist: does your PPM program really exist

If you are a building manager and are not sure whether you have a program or just a feeling of a program, go through the six points:

• A complete asset list — for every substantial system in the building there is a recorded unit, manufacturer, serial number and exact location.
• A defined and justified frequency — every asset has a defined inspection frequency that originates in a manufacturer's instruction or a standard — not in habit.
• Statutory inspections on the schedule — elevator, fire, electrical — slotted as events with a date, and not managed in response to authority letters.
• Real-time documentation — every inspection performed is documented: who did it, when, what was found — and does not stay in the maintenance worker's head.
• A deficiency becomes a task — every deficiency discovered automatically becomes a task with a responsible party and a date, and not a "we should deal with this sometime".
• A question you can answer immediately — "When was the suppression system last inspected?" — if the answer requires a search with the maintenance worker, that is a sign.

If you checked fewer than four — what you have is breakdown maintenance in disguise. And it is fine to admit it; that is the starting point of every building that transitions to an orderly operational regime.

Why PPM pays for itself — and over which time horizons

The building owner's real question is not "how much does PPM cost" but "what does its absence cost". The answer accumulates across several channels operating simultaneously:

• Longer equipment lifespan — equipment maintained per the manufacturer's instructions lasts additional years before replacement.
• Lower energy consumption — systems working at their correct operating point simply consume less.
• Fewer emergency calls — and the emergency callout premiums that are saved.
• Compliance and liability — insurance that does not refuse to pay out for non-maintenance.
• Stable occupancy — tenants who do not experience shutdowns renew leases. Stable occupancy is the most valuable asset in an office building, and preventive maintenance is one of the things that preserves it quietly, beneath the surface.

A PPM program is not an expense — it is a transfer of cost from a place where you do not control it (a sudden failure) to a place where you do (planning). The building will cost you resources in any case; the only question is whether you choose when and how, or whether it chooses for you.

This is exactly the work Domera is built to do: to translate manufacturer instructions and the Israeli standard into a scheduled round plan, to run it in the field floor by floor and system by system, and to ensure every deficiency becomes a closed task rather than a hidden cost.

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