Supplier Reliability Score Calculator

Score suppliers using lead time, on-time delivery %, and defect rate. Save results and compare options in a simple table.

Inputs

Result

Score Explanation Status
Enter values and click Calculate Score.

Saved Suppliers

Example Comparison

How the Supplier Reliability Score is Calculated

The supplier reliability score is a composite metric that evaluates a supplier’s performance based on three key factors:

  • Lead Time (days): The average number of days it takes for the supplier to deliver goods after an order is placed. Shorter lead times are better.
  • On-Time Delivery (%): The percentage of orders delivered on or before the promised date. Higher percentages indicate greater reliability.
  • Defect Rate (%): The percentage of delivered items that are defective or non-conforming. Lower defect rates are better.

Formula (example):

Reliability Score =
    (On-Time Delivery % × Weight₁)
  + (Lead Time Score × Weight₂)
  + (Defect Rate Score × Weight₃)

Where:
  - On-Time Delivery % is used directly (higher is better)
  - Lead Time Score is calculated by normalizing lead time (shorter = higher score)
  - Defect Rate Score is calculated by normalizing defect rate (lower = higher score)
  - Weights (Weight₁, Weight₂, Weight₃) can be adjusted based on business priorities (e.g., 0.5, 0.3, 0.2)

This approach allows you to compare suppliers on a consistent, quantitative basis, taking into account both speed and quality.

Frequently Asked Questions

A score above 80% is generally considered good, but the ideal threshold depends on your industry and risk tolerance. Always compare suppliers relative to your own requirements.

Lead time and defect rate are converted to scores on a 0–100 scale, where lower values yield higher scores. This ensures all factors are comparable and weighted appropriately.

Yes. Adjust the weights in the formula to reflect what matters most to your business (e.g., prioritize on-time delivery or quality).

Order volume is optional and can be used to track or compare suppliers with different business scales, but it does not affect the reliability score calculation.

Enter supplier data, calculate scores, and use the comparison table to benchmark multiple suppliers. Use the results to inform sourcing decisions and supplier development efforts.

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