Ask it a realistic multi-item scenario involving a room (e.g., bedroom, kitchen, garage, etc.).
ex: I want to fit a tall refrigirator and an L shaped couch in my 14x20 feet room
Evaluate the result:
(1)Did the answer feel correct? Why or why not?
(2)Did you trust the conclusion?
(3)Did the response time feel acceptable?
(4) Did the visual accurately represent scale and spacing?