Equipment Utilization Calculator

Cost per Operating Hour takes a fixed $150/hr ownership cost applied across all Available Hours, then divides that total by Operating Hours -- so equipment that sits idle often spreads the same fixed cost over fewer productive hours. At the default 176 available and 120 operating hours, this comes out to $220/hr, well above the raw $150/hr figure.

Utilization Rate measures how much of the scheduled time the equipment was actually working (Operating Hours divided by Available Hours), while Mechanical Availability measures how much of that scheduled time the equipment was capable of running at all (Available Hours minus Maintenance Hours, divided by Available Hours) -- a machine can be highly available but still poorly utilized if it sits idle rather than broken down.

Unaccounted Hours is Available Hours minus the sum of Operating, Idle, and Maintenance Hours -- any scheduled time not logged under one of those three categories, such as a gap in the operator's time tracking. It's floored at zero, so double-counted or over-reported hours in the other categories won't push this figure negative.

Neither, directly -- Utilization Rate is Operating Hours divided by Available Hours and never reads Idle Hours at all, and Mechanical Availability only subtracts Maintenance Hours. Raising Idle Hours on its own leaves both figures unchanged; Utilization Rate only drops when Operating Hours itself falls (or Available Hours rises), and Idle Hours matters for its own Idle Rate figure and for keeping Unaccounted Hours from growing, not for Utilization Rate or Mechanical Availability directly.