Leading and Lagging Indicators in Project Performance Measurement

PMBOK v8 Definition

Leading indicators are predictive measurements that forecast future project performance and identify potential problems before they occur. Examples include stakeholders who are not available or engaged, poorly defined project success criteria, and lack of a risk management process. Lagging indicators measure project deliverables or events after the fact, reflecting past performance or conditions—such as deliverables completed, schedule or cost variance, and resources consumed. Using leading indicators is preferable because they can prevent future problems that may require rework.

Why It Matters for the Exam

This concept appears frequently in PMI exam questions testing your ability to distinguish between predictive and retrospective performance measurements. You will encounter it in situational questions where you must select the appropriate indicator type for monitoring project health, as well as in definition-based questions asking which indicator type provides early warning signs of potential problems.

Key Points to Remember (for the exam)

• Leading Indicator Purpose: Predicts future performance and prevents problems before they occur
• Lagging Indicator Purpose: Measures past performance and provides information after the fact
• Preference Rule: Leading indicators are preferable whenever possible because they reduce rework
• Quantifiable Leading Indicators: Project size, number of items in backlog
• Qualitative Leading Indicators: Lack of risk management process, unavailable stakeholders, poorly defined success criteria
• Lagging Indicator Examples: Number of deliverables completed, schedule variance, cost variance, resources consumed
• Root Cause Analysis: Lagging indicators can reveal correlations (e.g., schedule variance correlating with team dissatisfaction)

Typical PMI Exam Example

A project manager notices that key stakeholders have stopped attending status meetings and the project success criteria were never formally documented. The project is only 20% complete. Which type of indicator should the project manager use to assess potential performance risk?

Answer: Leading indicators—the unavailable stakeholders and poorly defined success criteria are early warning signs that project performance may be at risk.

PMI Exam Traps

• Trap: Confusing leading indicators with lagging indicators

• Reality: Leading indicators predict future problems; lagging indicators report what already happened

• Trap: Thinking leading indicators must always be quantifiable

• Reality: Leading indicators can be qualitative (e.g., stakeholder engagement level, risk management process existence)

• Trap: Believing lagging indicators are less useful than leading indicators

• Reality: Lagging indicators help find correlations between outcomes and environmental variables (e.g., schedule variance correlating with team dissatisfaction)

• Trap: Assuming leading indicators replace lagging indicators entirely

• Reality: Both are needed—leading indicators for prevention, lagging indicators for historical analysis and root cause identification

Important PMI Connections

Quick Review Questions

1. Which type of indicator—leading or lagging—is preferable for preventing future problems that may require rework?

2. A project shows a schedule variance of -15%. Is this a leading or lagging indicator?

3. Name three qualitative examples of leading indicators that signal project performance may be at risk.

4. How can lagging indicators be used beyond simply measuring past performance?

5. What action should a project team take when a leading indicator measurement shows an unfavorable trend?

PMBOK v8 Reference

Section 2.1.5.2 – Lagging Indicators Section 2.1.5.3 – SMART Criteria Section 2.1.5 – Measurement and Performance Management