Furniture fit is a solved problem that keeps being unsolved, because the question is not "is the room big enough." It is "can this object travel from the truck to that wall." Those are different measurements and people only take the first one.
Measure the route, not the destination
A whole-house scan captures the path along with the rooms:
- Door openings, measured width and height, every one on the route
- Hallway widths, which is where a sofa actually gets stuck
- Stair runs and landings, with the turn that defeats a box spring
- Ceiling heights, for an armoire that has to be tilted up
The classic failure is a piece that clears the front door and then meets a 90-degree turn at the top of the stairs. The scan has that turn in it.
For the delivery side
Furniture retailers and movers who want to stop eating failed deliveries can have the customer's access documented in advance. A model with measured openings answers "will it fit" before a truck is dispatched, which is considerably cheaper than finding out in a driveway.
For the person moving
Scan the new place during the walkthrough. Then at the old place you know whether the sectional is coming, whether the dining table fits the new room, and where the bed can actually go. Layout planning from a measured plan beats a tape measure and optimism, and it is the difference between a weekend of rearranging and getting it right the first time.
For staging and estate work
Plan an entire placement from the model before anything is carried in. Movers with a layout do not set a piece down twice.
The simple version
Scan the house. Walk the model from the front door to the destination room. Check every opening along the way.
The room is almost never the problem. The hallway is the problem.