The field supervisor spot-checks installs and stands behind the labour warranty.
Someone has to look at finished jobs with fresh eyes: pitch on a flue, a drain that will freeze, a thermostat left in the wrong mode. That is this role.
If we have to come back on our labour, the supervisor owns that callback and the fix.
Jobs that still look right six months later. If you book this kind of work, this is the seat on the truck that is accountable for it.