nfr-design

Measurable non-functional requirements are created by translating business goals into Service Level Indicators (SLIs) and Service Level Objectives (SLOs). This approach enforces quantifiable reliability targets, risk budgets, and traceable governance across complex architectures.

SLOs and SLIs are quantifiable targets and metrics that govern service reliability. You need them when defining explicit performance constraints, degradation policies, and reliability planning to maintain user experience during partial failures or peak loads.

Error budgets and degradation thresholds are set by defining SLOs and specifying degradation strategies that preserve user experience during peak loads or failures. This governs acceptable reliability limits and aligns engineering work with explicit risk budgets for critical services.

Yes, you can document NFR decisions across complex architectures by enforcing traceable documentation of NFR decisions. This approach applies governance over thresholds and quantifiable targets, ensuring reliability constraints are recorded across all environments.

The best way to align engineering work with explicit reliability targets is to draft SLOs and SLIs for a service, set budgets, and document degradation thresholds. This ensures product teams have measurable NFRs and explicit risk budgets for critical services.