A typical sequence is demolition, framing and drain work, the rough plumbing inspection, waterproofing, a water test of the shower floor, then tile and glass. In Marion, the plumber files a plumbing permit with the Building Department separately from any building permit, and the evening inspection slots set the pace between rough-in and waterproofing.
Expect the remodeler to check the floor framing, the location of the existing drain, and how far the stack is from the new shower. They should explain whether the drain stays put or moves, which drain style fits the floor depth, and how they'll test the waterproofed base before covering it.
If the job grows into a larger renovation, the Fire Department may require hardwired smoke and CO alarms, which brings its own permit and inspection. Ask at the outset whether your scope is likely to cross that threshold.