SLA Service Level Agreement — a promise in a contract about how well a supplier will perform. Response time, uptime, delivery speed, etc.
KPI Key Performance Indicator — a specific number you track to measure whether the SLA is being met. "99.9% uptime" is a KPI.
Service Credits Money the supplier owes you when they fail to meet SLA targets. Like a refund for poor service — but only if you claim it.
Contract Value Leakage Money lost because contract terms aren't enforced — missed discounts, unclaimed credits, unapplied penalties.
Supplier Performance Mgmt The ongoing process of tracking, measuring, and improving how well suppliers deliver against their contracts.
Aspirational Language Contract wording that sounds good but carries no legal weight — "best efforts," "strive to," "commercially reasonable."