GIFSQ Tools · Module 18 — Manufacturing, Costing & Supply Chain · Tool 352 of 500
Score a supplier on the four things that matter — quality, delivery, price and service — each out of 100, and get an overall score, the weakest area, and the spread between best and worst.
Try sample values — fills the form with the worked example below.
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Overall score
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Weakest score
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Spread (best − worst)
Equation: Overall score = (quality + delivery + price + service) ÷ 4. Weakest score = the lowest of the four. Spread = highest − lowest.
Method: Supplier scorecard with equal weights: each of the four standard criteria (quality, delivery, price, service) is scored out of 100 and averaged. Equal weighting is the starting point — weight the criteria when your business depends more on one of them.
Assumptions: each score is a fair 0–100 judgement from the same period (for example the last quarter); the scores are comparable across suppliers only when the same evidence is used for each.
Limitations: an average hides a single bad criterion — always read the weakest score with the overall; the scorecard measures past performance, not future reliability.
Rounding: overall score to 2 decimal places; weakest and spread as whole numbers; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Method: Supplier scorecard with equal weights: each of the four standard criteria (quality, delivery, price, service) is scored out of 100 and averaged. Equal weighting is the starting point — weight the criteria when your business depends more on one of them.
Assumptions: each score is a fair 0–100 judgement from the same period (for example the last quarter); the scores are comparable across suppliers only when the same evidence is used for each.
Limitations: an average hides a single bad criterion — always read the weakest score with the overall; the scorecard measures past performance, not future reliability.
Rounding: overall score to 2 decimal places; weakest and spread as whole numbers; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Worked example: Quality 90, delivery 80, price 70, service 85: overall = 81.25; weakest = 70 (price); spread = 20.
Enter values above to see results.
A spread above 30 means the supplier is uneven — strong in one area, weak in another — and the weak area is where the conversation should start. Tool 352 of 500 — GIFSQ
