Supplier Scorecard Calculator
Calculate weighted supplier score across quality, delivery, cost, and service.
About this calculator
A supplier scorecard turns a subjective vendor review into a single, repeatable composite number by scoring performance across several dimensions and combining them according to how much each one matters to your business. This calculator takes four 0-100 dimension scores -- Quality, Delivery, Cost, and Service -- each paired with its own weight, and computes Weighted Score as the sum of each dimension's score multiplied by its weight, normalized so the four weights always sum to 100% regardless of the raw numbers you enter (a weight of 30 alongside weights of 25, 25, and 20 is treated as 30% of the total, not a raw 30-point bonus). Grade buckets the Weighted Score into a familiar A-through-D scale -- A at 90 or above, B from 75 to 89, C from 60 to 74, and D below 60 -- for a quick read that doesn't require interpreting a raw number.
Score Range, the gap between a supplier's highest and lowest individual dimension score, flags an uneven performer: a supplier who scores 95 on quality but 40 on delivery has real operational risk that a single averaged number can hide. Use this quarterly during supplier business reviews, and re-weight the dimensions to match what actually matters for a given category of spend -- delivery reliability might dominate for just-in-time manufacturing inputs, while cost might matter more for commodity supplies.
Inputs
Results
Weighted Score
81.9
How to Use This Calculator
- Rate the supplier from 0-100 on each of the four dimensions: Quality Score, Delivery Score, Cost Score, and Service Score.
- Set Quality Weight, Delivery Weight, Cost Weight, and Service Weight to reflect how much each dimension matters for this supplier or category of spend -- the four weights don't need to sum to 100, since they're normalized automatically.
- Review Weighted Score, the normalized composite across all four dimensions, and Grade, its A-through-D letter-grade summary.
- Check the per-dimension Weighted values (Quality, Delivery, Cost, Service) to see how much each dimension is contributing to the composite.
- Watch Score Range -- a large gap between a supplier's best and worst dimension flags an uneven performer that the composite score alone can hide.
- Use the scorecard quarterly during supplier reviews, re-weighting the dimensions to match what actually matters for that supplier's category of spend.
How the result changes with Quality Score (0-100)
| Quality Score (0-100) | Weighted Score |
|---|---|
| 43 | 69.3 |
| 64 | 75.6 |
| 100 | 86.4 |
What each input means
- Quality Score (0-100)
- Quality performance score (defect rate, compliance).
- Quality Weight
- Importance weight for quality dimension.
- Delivery Score (0-100)
- On-time delivery performance score.
- Delivery Weight
- Importance weight for delivery dimension.
- Cost Score (0-100)
- Cost competitiveness score.
- Cost Weight
- Importance weight for cost dimension.
- Service Score (0-100)
- Responsiveness, communication, flexibility score.
- Service Weight
- Importance weight for service dimension.
How this is calculated
Worked example, using the default values
- Identify Input Parameters8 parametersQuality Score (0-100) = 85, Quality Weight = 30, Delivery Score (0-100) = 78, Delivery Weight = 25, Cost Score (0-100) = 90, Cost Weight = 25, Service Score (0-100) = 72, Service Weight = 20 = 8 input(s) provided
- Calculate Weighted ScoreWeighted Score81.9 = 81.9
- Calculate GradeGradeB = B
- Calculate QualityQuality (Weighted) = qualityScore x normalized qualityWeight25.5 = 25.5
Engine last updated . Checked against 1 independently-derived test — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
Why does the calculator normalize the weights instead of using them directly?
Normalization means the four weights are always treated as shares of 100%, no matter what raw numbers you enter -- weights of 30, 25, 25, and 20 sum to 100 and are used as-is, but weights of 60, 50, 50, and 40 (summing to 200) are each divided by that 200 total first, landing at the same effective 30%, 25%, 25%, 20% split. This lets you think in terms of relative importance (quality matters roughly 1.5x as much as service) without having to make your own weights sum to exactly 100 by hand.
How is the letter Grade different from the Weighted Score?
Weighted Score is the precise 0-100 composite number; Grade buckets that number into four familiar tiers -- A (90+), B (75-89), C (60-74), and D (below 60) -- the same way a school report card works. Use Weighted Score when comparing suppliers precisely against each other or tracking a single supplier's trend over time, and use Grade when communicating results quickly to stakeholders who don't need the exact decimal.
What does a large Score Range tell me that Weighted Score doesn't?
Score Range is the gap between a supplier's best and worst individual dimension score, and it flags inconsistency that an averaged Weighted Score can mask -- two suppliers can post the same 75 weighted score, but one might be reliably mediocre across every dimension while the other is excellent on quality and poor on delivery. A large range signals real operational risk worth investigating even when the overall score looks acceptable.
Should I use the same weights for every supplier and category?
Not necessarily -- the right weighting depends on what matters most for a given category of spend. A just-in-time manufacturing input might warrant weighting Delivery highest, since a late shipment can stop a production line, while a commodity office supply might reasonably weight Cost highest since quality and service risk are low. Set weights that reflect your actual business risk for each supplier category rather than reusing one default split everywhere.
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