João CarreiroNo boring stuff. Impossible is welcome.Whipit

Historical estimate · 2025-07-05

Testing at 10,000 watches per year

English translation of the Portuguese source. Original cost table and assumptions only. Test suitability, labour rates and unit costs were not validated; the later purchasing advice is omitted.

Impact of producing 10 000 units/year

(amortisation over 3 years → 30 000 watches tested)

Machine option & capacity Machine price (CAPEX) Amortisation €/unit Labour €/unit¹ Materials (O-ring + LOCA) Scrap/retest Total Δ COGS Within €0.25?
A — Manual “wet” test, 6 ATM (2 watches, ~30 units/h) US$120 ≈ €110 0.004 0.067 0.15 0.01 ≈€0.23 Yes
B — Vacuum + pressure bench, 6 bar (90 units/h) US$3 600 ≈ €3 300 0.11 0.022 0.15 0.01 ≈€0.29 Almost
C — Automatic in-line machine (200 units/h) €15 000 0.50 0.022 0.15 0.01 ≈€0.69 No

¹ Operator paid €2/h; throughput as indicated for each machine type.