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A vendor scorecard weights quality, delivery, cost and service — commonly 35/30/20/15 — into a single comparable figure. Reporting the weakest dimension alongside the total prevents a strong average from hiding a single unacceptable failure area.
Weighted score
Score = Quality x 35% + Delivery x 30% + Cost x 20% + Service x 15%
Because a cheap supplier that fails on quality or delivery costs far more than the price saved. Cost is already tested at award through the tender.
Yes. Safety-critical parts weight quality far higher; commodity supplies can weight cost more heavily.