A store owner in Manila once told me his biggest fixture cost wasn't the racks — it was the night before opening, when four people spent six hours assembling a shipment with missing hardware and mis-drilled holes. That night is exactly what a proper flat pack design is supposed to delete. Most don't.
Assembly time is a real number, so ask for it
Any supplier who's actually tested their own product can tell you how long it takes. Our flat pack double-rail assembles in 12–15 minutes on first attempt and 6–8 once a fitter knows the sequence. If a supplier can't answer that question — or answers "very easy" — they've never stood on a shop floor holding the Allen key themselves.
Joinery decides everything about flat pack
Three approaches exist, and the differences are bigger than they look. Full bolt assemblies are the cheapest to make and the slowest to build — expect 20+ fasteners per unit. Snap-lock plastic joints cut that to a handful of steps, but their long-term rigidity depends entirely on the plastic's glass fiber content; cheap nylon creeps and the rack leans within months. Hybrid designs — welded frame, bolt-on rails — split the difference and survive shipping better than either extreme.
The tolerance check that predicts everything
Here's the test I run on any new flat pack sample: dry-assemble it without force. Every hole should accept its fastener by hand until the final quarter-turn. If you're fighting alignment, the punching dies are worn or the tubes shifted in welding — and that fight multiplies by however many units you bought. Hole alignment inside ±0.5 mm is the standard a serious factory holds. You can feel the difference blindfolded.
What flat pack costs you besides time
Knock-down packing cuts freight meaningfully — roughly 40% more units per container than assembled shipping — and carton damage drops because packed parts nest. The trade-off is your assembly labor and the occasional missing-bag incident. Counter that by ordering 2% spare hardware packs with the shipment; they cost almost nothing and they've saved more opening days than any discount ever has.
Manila store, incidentally: the second shipment went up in under two hours, one person, no phone calls to my team. Sometimes the best after-sales service is the one you never need.