Is your maintenance spend in the world-class band?
Maintenance cost as a percent of Replacement Asset Value (RAV) is the ratio reliability leaders use to compare spend across plants of any size. Enter your annual maintenance spend and the replacement value of your assets, and see where you land against SMRP's best-in-class mark of under 3 percent, and what closing the gap is worth. Numbers update as you type.
Your plant
Use total maintenance spend (labour, parts, contractors) and the replacement value of the assets that spend covers. For labor rates, see maintenance mechanic wages by state.
Not sure of your RAV?
A common estimate is the insured or booked replacement value of your plant and equipment. If you only know one line or area, enter the spend and RAV for that area and the ratio still holds.
Where you stand
Your numbers appear here.
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You cannot cut what you do not track.
A high ratio usually hides in reactive work no one logged. The free OEE Tracker separates breakdowns from planned work so you can see how much of your spend is unplanned, which is the part that moves this number.
Open the free OEE TrackerMove spend from reactive to planned, and the ratio follows.
Unplanned failures cost several times more than the same job on a schedule. Fabrico reads condition straight from the machine, triggers the work before the breakdown, and links a detected fault to a work order opened from the stop, so the reactive share of your spend, and this ratio, come down.
Book a Fabrico demoWhy maintenance cost as a percent of RAV matters
Raw maintenance spend tells you nothing without scale. A five-million-euro budget is lean for a large refinery and enormous for a single line. Dividing spend by Replacement Asset Value normalises it, so you can benchmark against other plants and track your own trend honestly. It is one of the most-cited reliability KPIs for exactly that reason.
The bands
SMRP says top performers in all industries keep reliable plants under 3 percent of RAV (source: SMRP, 2018). We found no published band for typical or reactive plants; a high ratio often comes from unplanned failures, expedited parts and overtime, but asset age and process matter too. The right target shifts with asset age and industry, so treat the band as a direction to move, not a pass or fail line.
The math
Maintenance cost as a percent of RAV = annual maintenance spend divided by Replacement Asset Value, times 100. The reduction to reach 3 percent = current spend minus 3 percent of your RAV, when your ratio is above three.
Reactive repairs are the costly part of maintenance spend. The guides for the brine injector, vacuum tumbler, meat grinder and fluid bed dryer list common failures and how to prevent them, which is how spend moves from reactive to planned.
What counts as maintenance spend?
Total maintenance cost for the period: in-house labour, spare parts and materials, contractor and service costs, and maintenance-related overtime. Keep it consistent year to year so the trend is meaningful.
How do I estimate RAV?
Use the cost to replace your maintainable assets new, often taken from the insured or booked replacement value of plant and equipment. Land and buildings are usually excluded. If you only have one area's figures, calculate the ratio for that area.
How do we bring the ratio down?
Shift work from reactive to planned. Because a breakdown costs several times a scheduled repair, cutting unplanned failures lowers total spend. The preventive maintenance ROI calculator and the CMMS ROI calculator show what that shift is worth, and in Fabrico a technician opens the work order from the machine stop, in the same system.
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