A supply chain KPI is a measurable indicator that shows how well a part of the supply chain performs against a goal. The most useful supply chain metrics cover cost, service, inventory and speed, and each needs a clear formula, a data source and an owner. Most teams do better with a short list than a long one.
Core supply chain KPIs and how they are calculated
The table lists widely used measures. Definitions vary slightly between companies, so write down the exact formula before comparing numbers over time.
| KPI | Formula | What it shows |
|---|---|---|
| Perfect order rate | Orders delivered on time, in full, undamaged and with correct documents, divided by total orders | Overall order quality |
| On-time in-full (OTIF) | Orders delivered on time and complete, divided by total orders | Delivery reliability |
| Fill rate | Units shipped from stock, divided by units ordered | Product availability |
| Forecast accuracy | One minus absolute forecast error divided by actual demand (or a related measure such as WAPE) | Quality of demand planning |
| Inventory turnover | Cost of goods sold divided by average inventory value | How often stock is sold and replaced |
| Days of supply | Inventory on hand divided by average daily usage | How long stock would last |
| Cash-to-cash cycle time | Days of inventory plus days of receivables minus days of payables | Working capital tied up in the cycle |
| Supplier on-time delivery | Supplier orders received by the promised date, divided by total supplier orders | Supplier reliability |
| Order cycle time | Time from order placement to delivery | Speed of fulfilment |
| Total supply chain cost | Transport, warehousing, inventory carrying and administration costs, often as a share of revenue | Cost efficiency |
How to choose a small set
Start from business goals, not from a catalogue of metrics. If the aim is to improve customer service, begin with OTIF and fill rate. If cash is tight, look at inventory turnover and cash-to-cash cycle time.
- Name the two or three outcomes that matter most this year.
- For each, pick one or two KPIs that move when the outcome improves.
- Check that the data exists and is reliable enough to trust.
- Assign a person who can act on each number.
- Decide the review rhythm, such as weekly for operations and monthly for management.
- Review the set once a year and drop measures that no longer drive decisions.
Balancing trade-offs
KPIs pull against each other. Raising fill rate usually means holding more stock, which lowers turnover. Cutting transport cost by consolidating loads may lengthen cycle time. Looking at paired measures, such as service level with inventory level, prevents optimizing one number at the expense of another.
Setting targets
Targets should come from customer needs, past performance and what the process can realistically reach. Industry benchmarks can give context, but definitions differ, so a benchmark that uses another formula can mislead. Use a trend over time as the first test: is the measure improving, flat or getting worse?
Practical checklist
- Every KPI has a written definition, formula and data source.
- Numbers are calculated the same way in every report.
- Reports separate causes (late supplier, stockout, carrier delay) from the headline figure.
- Exceptions are explained, not hidden in averages.
- The list is short enough to review in one meeting.
Where AI and analytics fit
Dashboards automate calculation and can flag drift or unusual values. Machine learning can help find the drivers behind a missed target, such as which suppliers or lanes account for most late deliveries. It cannot choose the right KPI for a business, and it depends on consistent definitions in the source data.
Common questions
How many KPIs should a team track?
There is no fixed number. A practical rule is that each KPI should have an owner and lead to a decision. If it does not, it is probably noise.
What is the difference between a KPI and a metric?
A metric is any measurement. A KPI is a metric tied to a strategic goal and used to judge performance.
Is OTIF the same as perfect order rate?
No. OTIF checks timeliness and completeness. Perfect order rate adds further conditions such as damage-free delivery and correct documentation.