When should we pick Economy ~17 days instead of Standard ~10?

Sketch totals: express ~6 days, standard ~10, economy ~17 — production days + an international-freight sketch. Anodize, powder, and CMM add on production; they do not vanish because you picked economy.

Quantity 1 can pick any tier. Preview with no login. Engineering confirms within 12h UTC+8 whether the stack still fits that tier.

Duty is not included. No implants. Economy is not “skip process confirmation.”

Related process guide