Before any digging, I go over the plans with you and what drives the cost, so the number makes sense before we start. Then our crew marks the footings out where the plans put them, digs, and gets the subgrade, which is the ground the concrete sits on, firm and clean. We build the forms, set the rebar, the steel bars that give concrete the strength it doesn't have on its own, and leave it all open until the inspector has seen it. After that we pour, work the air out, finish the top, let it cure and clean up. If the budget gets tight, the digging and the ground under the footing are the last place I'd cut, because nobody ever sees the top of a footing, but everything you build later rides on what's below it.
Some footing jobs touch other work. If we have to get through an existing slab, patio or driveway to reach the ground, we do the concrete cutting ourselves so the cut stays clean and no bigger than it needs to be. If what you've got is an older house or slab that has already settled, that's a different job, and our foundation raising page explains it.