Performance Drift

D03 - Vendor Contract Quality

Definition

The first stage of vendor dependency degradation, when a vendor's metrics trend in the wrong direction for three or more consecutive periods while remaining within SLA tolerance, signaling a declining relationship before it becomes a formal compliance issue.

Performance drift is the gap between "still within SLA" and "actually getting worse." Without an independent measurement system, this gap is invisible.

A vendor can be degrading in practice while technically compliant on paper, and the first sign a company notices is a Stage 3 contract rigidity or a Stage 4 lock-in situation.

Indicators

• A vendor's metrics have trended in the wrong direction for two or more consecutive quarters without a formal response.
• You are relying on vendor self-reported performance rather than independently measured data.
• No threshold exists in your vendor management process for when a trending (but still compliant) metric triggers a conversation.

Quick Win

• Pick one vendor.
• Pull their self-reported performance for the last quarter.
• Now pull three recent delivery or performance data points from your operational records.
• Compare your independently measured figures against the vendor's self-reported rate.
• A gap of more than three percentage points is your finding.

Assess

• Take the HQ Score Assessment

Learn

• IA-04: The Vendor Relationship Spectrum

Apply

• The Vendor Contract Audit Workbook
• The Vendor RFP Process Checklist

Related

• Vendor Dependency
• Responsiveness Decline
• Carrier Performance Review
• Vendor Performance Scorecard
• Contract Rigidity