Supplier Performance Calculator
Score and rank suppliers on quality, on-time delivery, cost competitiveness, and service using your chosen weighting scheme. Use this during supplier reviews, contract renewals, or when selecting between competing vendors.
About this calculator
A supplier performance scorecard aggregates multiple KPIs into a single weighted score so procurement teams can compare vendors objectively. Each dimension — quality, delivery, cost, and service — is rated as a percentage from 0 to 100. The overall score depends on the weighting scheme selected. Under equal weighting: Score = (Quality + Delivery + Cost + Service) / 4. Under quality-focused weighting: Score = Quality × 0.4 + Delivery × 0.2 + Cost × 0.2 + Service × 0.2. Under delivery-focused weighting: Score = Quality × 0.2 + Delivery × 0.4 + Cost × 0.2 + Service × 0.2. Under cost-focused weighting: Score = Quality × 0.2 + Delivery × 0.2 + Cost × 0.4 + Service × 0.2. Suppliers scoring above 85% are generally considered preferred; 70–84% acceptable; below 70% requires a corrective action plan. Choosing the right weighting scheme ensures the scorecard reflects your actual business priorities.
How to use
Suppose Supplier A scores: Quality 90%, On-Time Delivery 80%, Cost Competitiveness 75%, Service 85%. You are in a regulated industry, so you select the quality-focused weighting scheme. Step 1: Apply weights — 90 × 0.4 = 36, 80 × 0.2 = 16, 75 × 0.2 = 15, 85 × 0.2 = 17. Step 2: Sum the weighted scores — 36 + 16 + 15 + 17 = 84. Step 3: The supplier scores 84%, placing them in the 'Acceptable' tier. Their cost competitiveness of 75% is the weakest dimension and should be flagged for renegotiation in the next contract review.
Frequently asked questions
What weighting scheme should I use for a supplier performance scorecard?
The right weighting scheme depends on your supply chain's primary risk and business model. If product defects create regulatory liability or safety recalls, use quality-focused weights (40% quality). If stockouts are your biggest operational threat, use delivery-focused weights. If you operate in a commodity market with thin margins, cost-focused weights make sense. Many organizations start with equal weights and adjust after their first scoring cycle once they understand which KPI failures have caused the most disruption historically. Re-evaluating weights annually is good practice as business priorities shift.
How often should supplier performance scores be calculated and reviewed?
Most procurement teams calculate supplier scores quarterly for strategic and preferred suppliers, and annually for occasional-use vendors. High-spend or sole-source suppliers often warrant monthly monitoring, especially for delivery and quality metrics which can degrade quickly. The scorecard should feed directly into a formal supplier review meeting where trends — not just point-in-time scores — are discussed. A supplier whose score drops three consecutive quarters signals a deteriorating relationship that needs intervention before it becomes a supply disruption.
What is a good supplier performance score and what should I do if a supplier scores poorly?
A score above 85% is generally considered 'Preferred' status, meaning the supplier meets or exceeds expectations across all KPIs. Scores between 70% and 84% are 'Acceptable' but should prompt a targeted improvement discussion focused on the lowest-scoring dimension. Scores below 70% indicate a supplier requiring a formal corrective action plan with measurable milestones and a re-evaluation date, typically 90 days. If a supplier fails to improve past the corrective action period, the score provides documented, objective justification for sourcing diversification or disqualification.