Asset maintenance management is usually described as a discipline and is better understood as four decisions taken in a particular order. What do we own. Which of those things matter if they stop. What does each one need and how often. Can the people we have actually do that much work. Sites that take them in that order build programmes that survive a bad month. Sites that start at the third, which is the natural instinct because it feels like the real maintenance question, build schedules that are quietly abandoned by the second quarter. This page takes them in order and says what each one costs to skip.
What we own: skipping it produces invisible assets
The register is the long part and the boring part, and the assets that get missed are systematically the risky ones: shared plant nobody owns, equipment that came with the building, standby kit that only matters when it is needed. A programme built on an incomplete register has holes exactly where nobody is looking.
What matters: skipping it produces uniform intervals
Criticality ranking is what lets you spend attention unevenly. Without it, everything gets the same interval, which means over-maintaining most of the plant while the few things that would really hurt get no more attention than a roller door.
What each needs: skipping it produces borrowed intervals
Manufacturer figures adjusted for your duty, with the departures written down. A pump on continuous duty in a dusty room is not the pump the manual assumed, and an interval copied from another site's identical machine is an assumption about their environment, not yours.
Whether we can staff it: skipping it produces deferral
180 assets at four tasks a year at 1.1 hours is 66 technician hours a month on the worked example this site publishes, $3,168 at a $48 loaded rate. A schedule agreed without that arithmetic is a wish, and wishes lose to breakdowns every single time.
Questions people ask about asset maintenance management
Which decision is most often skipped?
The fourth, and it is the one that decides whether the other three survive. Costing a schedule in hours takes an afternoon and prevents a year of quiet deferral.
Do small sites need criticality ranking?
Yes, and it is quicker: with thirty assets somebody can rank the top five in an hour, and that ranking does most of the work.
How often should the four be revisited?
The register continuously as things change, criticality when the operation changes, intervals annually against findings, and staffing whenever the schedule or the headcount moves.