An aerospace supplier scorecard should include a balanced set of KPIs across delivery, quality, execution discipline, responsiveness, and supply risk. No single template fits every supplier. The right mix depends on whether the supplier provides raw material, machined parts, special processing, electronics, assemblies, or repair services, and on how critical the supplied item is to product safety, certification, or program schedule.
For most aerospace suppliers, a practical scorecard includes these KPI groups:
- Delivery performance
- On-time delivery to requested date
- On-time delivery to promise date
- Average days early or late
- Past-due open order value or line count
- Schedule adherence for split shipments or partials
- Quality performance
- Incoming defect rate or rejected lot rate
- Supplier-caused nonconformance rate
- Escape rate, if defects are found after receipt or downstream use
- Rework, scrap, or containment incidents tied to supplier issues
- Repeat nonconformance rate
- Documentation and traceability
- Certificate of conformity accuracy and completeness
- FAI completeness and acceptance where applicable
- Missing or incorrect cert packages
- Lot, serial, and material traceability accuracy
- Revision mismatch rate between PO, drawing, and delivered product
- Responsiveness and corrective action
- Average response time to supplier corrective action requests
- Corrective action closure time
- Effectiveness of corrective actions, usually measured by recurrence
- Acknowledgment time for expedites, shortages, or quality notifications
- Commercial and planning stability
- Lead time adherence
- Quote-to-actual variance, if commercial stability matters
- Capacity constraint notifications
- Forecast consumption alignment for scheduled suppliers
- Premium freight incidents attributable to supplier performance
- Risk indicators
- Single-source dependency exposure
- Special process approval status where relevant
- Cybersecurity or controlled data handling status if contractually required
- Financial or operational distress signals, when available
- Change notification compliance for process, source, site, or material changes
What usually matters most
If you need a short list, start with five to eight measures that can be defined consistently and supported by evidence:
- On-time delivery to requested date
- Supplier defect rate or rejected receipt rate
- Repeat nonconformance rate
- Corrective action closure timeliness
- Documentation accuracy at receipt
- Lead time adherence
- Change notification compliance
- Supplier responsiveness for shortages or quality issues
That is usually more useful than a large scorecard full of weakly governed metrics.
What to watch out for
Two common mistakes are over-weighting on-time delivery and using quality metrics with poor definitions. A supplier can hit OTD by shipping partials, shipping early in ways that create receiving problems, or repeatedly missing the need date but resetting promise dates. Likewise, PPM can be misleading if receiving inspection is inconsistent, defect attribution is disputed, or lot sizes vary materially.
Scorecards also break down when plants do not agree on basic definitions such as what counts as late, what counts as a supplier-caused defect, when a corrective action is considered closed, or which date field is authoritative. In brownfield environments, that is common because ERP, MES, QMS, supplier portals, and receiving workflows often do not share clean master data or event timing. If the underlying systems are not aligned, the scorecard can become an argument about data instead of a tool for supplier management.
How to weight the KPIs
Weighting should reflect risk and mission impact, not just ease of measurement. For example:
- Critical flight or safety-related parts may justify heavier weighting on traceability, documentation accuracy, and change control discipline.
- Capacity-constrained or long-lead suppliers may need stronger emphasis on lead time adherence, forecast response, and shortage communication.
- Special processors may need additional focus on cert package completeness, turnaround reliability, and repeat escapes.
Many organizations use different scorecard profiles by supplier class rather than forcing one universal model.
Should cost be included?
Yes, but carefully. Price variance alone is usually not enough. If you include cost metrics, they should reflect operational impact, such as premium freight, receiving disruption, sorting cost, reinspection, rework, line stoppage exposure, or administrative burden from documentation errors. In regulated environments, the cheapest supplier on piece price can still be the most expensive supplier to manage.
What makes a scorecard actionable
A useful scorecard does more than rank suppliers. It should support escalation, development, and sourcing decisions. That usually requires:
- Clear KPI definitions and data ownership
- A documented review cadence
- Thresholds for corrective action or supplier review
- Traceable linkage from score to underlying events such as receipts, NCRs, late lines, and corrective actions
- Change control when metric logic or weighting changes
Without that governance, scorecards often create noise rather than improving supplier performance.
So the answer is not just “OTD and PPM.” A credible aerospace supplier scorecard should include delivery, quality, traceability, responsiveness, and risk indicators, with definitions tight enough to survive audit scrutiny and operational challenge. The exact KPI set depends on supplier type, data readiness, and how well your existing ERP, QMS, MES, and receiving processes are connected.