WPP PROCUREMENT DICTIONARY™

Key Performance Indicator (KPI)

A measurable indicator used to assess whether an important aspect of contract performance is being achieved.

Contract DeliveryBeginner2 min readReviewed July 2026
30-second answer

A Key Performance Indicator is a defined measure used to monitor whether a contract, service or commitment is achieving an important required result.

Detailed explanation

A useful KPI has a clear definition, calculation, data source, target, frequency, owner and reporting route. Without these controls, two parties may interpret the same measure differently and disputes can arise about performance.

Tender responses should explain both the proposed target and how performance will be managed. Evaluators look for collection methods, verification, trend analysis, governance, escalation and corrective action—not merely a list of attractive percentages.

Suppliers should test whether the price and operational systems can support every KPI. Aggressive targets may create service-credit exposure, additional administration or staffing requirements that are not reflected in the commercial model.

Why it matters

Strong tender responses explain how KPIs will be measured, reviewed and corrected when performance falls short.

How buyers use it

The buyer uses KPIs to monitor critical outcomes, compare actual performance with contract expectations and trigger governance, improvement or contractual remedies.

What suppliers should do

  1. Define the formula and evidence source for each KPI.
  2. Assign an accountable operational owner.
  3. Confirm reporting frequency and buyer format.
  4. Set early-warning thresholds below the failure point.
  5. Link underperformance to corrective action and lessons learned.

Where it fits in the process

  1. 1KPI defined
  2. 2Data captured and verified
  3. 3Performance reported
  4. 4Variance investigated
  5. 5Corrective action and improvement tracked

Frequently asked questions

What makes a KPI measurable?

A precise definition, numerator and denominator where relevant, time period, source, exclusions and target.

Are all contract measures KPIs?

No. KPIs should focus on the most important outcomes, although wider management information may also be reported.

What is an early-warning threshold?

A level that triggers action before the contractual target is missed.

Should suppliers propose additional KPIs?

Only where permitted and valuable. Avoid unnecessary commitments that create cost or contractual risk.

How can KPI evidence improve tenders?

Historic performance data can prove capability when the method, period and source are clearly explained.

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