Facility Sizing

Facility sizing is the question of how many bays, how much shop floor and how much surrounding space a fleet operation needs. It tends to be asked once, when a building is designed, and then lived with for thirty or forty years.

The bay is the real capacity limit, not the headcount. A shop can hire a technician within a budget cycle and cannot add a bay in one. A shop short of bays either runs staff across shifts to use the ones it has or accepts that vehicles wait for space rather than for parts or labor. That waiting is downtime no maintenance metric will explain, because nothing was wrong with the vehicle and nobody was standing idle.

Sizing follows the mix rather than the count. A refuse packer, a ladder truck and a sedan do not need the same bay, differing in length, height, door clearance, lift capacity and the room a technician needs to work around them. A fleet that grew into heavier or taller units without changing its building is an ordinary situation, and it shows up as work sent outside for no reason except that it will not fit indoors.

The space that is not bays is the part most often cut from a project: parts storage, tool space, somewhere to receive and stage vehicles, and outdoor room for what is waiting. A building sized only for its bays pushes all of that onto the shop floor, where it consumes the capacity the project was meant to add.

Because the sizing exercise usually happens inside a capital process with a long horizon, it is worth sizing for the fleet the agency expects rather than the one it has. Electrification changes charging and clearance needs, and consolidating departments changes the mix. MPF publishes a Garage Bay and Space Needs Calculator for the first pass at this.