title: “[03] CISSP Cheatsheet - Security KPIs and Metrics” date: 2026-07-05 authors:
- Your Name
📘 Topic: Security KPIs and Metrics
Domain: D1 – Security and Risk Management
Tags: #cissp #metrics #kpi
🧾 Definition
Key Performance Indicators (KPIs) and metrics measure the effectiveness of security controls and help leadership make informed risk decisions. They should be actionable, measurable, and tied to business objectives.
🔑 Key Points
- Use metrics like MTTD (Mean Time to Detect), MTTR (Mean Time to Recover), patch compliance, number of incidents, and percent of critical assets with protections.
- KPIs should be SMART: Specific, Measurable, Achievable, Relevant, Time-bound.
- Avoid vanity metrics; focus on indicators that drive decisions and improvements.
⚠️ CISSP Insight
- CISSP candidates should understand governance-level metrics and how they support risk management and reporting to executives.
⚔️ Key Difference / Trap
- Metric vs KPI
- Metric = any measured value
- KPI = a metric tied to a business objective and action
- Trap: Reporting too many metrics without clear owners or actionables.
🏗️ Example
A security team tracks patch compliance weekly and reports trend-based KPIs to leadership; a drop triggers a remediation action and post-mortem.
📚 References
- NIST CSF measurement guidance
- ISO/IEC 27004 — Information security management — Measurement
- CIS Controls measurement recommendations
🔁 Quick Recall
- KPIs must be actionable, tied to risk, and support decision-making