An 8.1 m² room (270 × 300 cm) with a single bed, a desk and a wardrobe. The planner's verdict: the route is blocked right at the door. Pulling the layout apart turned up four separate mistakes.
1. Forgetting the doorway exists
On a floor plan a door is just a gap in a line. Easy to ignore. Here the wardrobe hides the right-hand 19 cm of the doorway, 9 cm off the back wall, so opening the door puts you face to face with the side of a wardrobe. And if the door swings right? It won't open all the way. Block out the 80 cm by the door before placing anything.
2. Leaving small gaps along the walls
Baseboards and outlets nudge furniture off the wall, and 12 cm here and there feels harmless. It isn't. You can't walk through 12 cm or store anything in it, and every centimeter comes out of the path on the other side. A bed frame on legs can sit over the baseboard and get much closer.
3. Keeping every piece the same way round
With the desk on the top wall and the wardrobe on the bottom, the room gets cut off top to bottom. Turn both 90° and stack them along the right wall instead.
The bed is now 110 cm from the desk and a meter from the wardrobe, and the doorway is clear. The desk faces the side wall, but it's the same desk, and cables are easier to hide with a wall behind the monitor. Check that a window on that wall won't throw glare on the screen.
4. Not noting where the outlets are
Turning the wardrobe covers the bottom meter of the right wall. Outlet there? Gone. In a small room, deciding what goes on one wall quietly decides what the others can be used for. When you go to measure, sketch the outlets, switches and windows on each wall too. That rough sketch tends to be more useful later than a list of numbers.