Project Managers Monitor EV Incrementally and Cumulatively

PMBOK v8 Definition

Earned value (EV) is the measure of work performed expressed in terms of the budget authorized for that work. It is the budget associated with the authorized work that has been completed. Project managers monitor EV, both incrementally to determine current status and cumulatively to determine the long-term performance trends. The EV being measured should be related to the performance measurement baseline (PMB), and the EV measured cannot be greater than the authorized PV budget for a component.

Why It Matters for the Exam

This concept is frequently tested in PMI exam questions related to the Monitoring and Controlling Process Group, specifically within Cost Management and Schedule Management knowledge areas. Questions typically appear as situational scenarios where you must interpret EV data to assess project health, calculate performance indices, or determine whether corrective action is needed. Understanding the dual nature of EV monitoring—incremental for immediate status and cumulative for trends—is critical for answering both calculation-based and conceptual questions.

Key Points to Remember (for the exam)

EV Definition: EV = budget authorized for work that has been completed. It is expressed in monetary terms, not hours or units.
EV Cannot Exceed PV: The EV measured cannot be greater than the authorized PV budget for a component. This is a common exam constraint.
Dual Monitoring Purpose: Monitor EV incrementally for current status (e.g., this week's performance) and cumulatively for long-term performance trends (e.g., project-to-date progress).
Relation to PMB: EV must be measured against the performance measurement baseline (PMB), which is the total planned value (PV) over time.
Percent Complete Calculation: EV is often used to calculate the percent complete of a project. Progress measurement criteria must be established for each WBS component.
Three EVM Dimensions: EV works alongside Planned Value (PV) and Actual Cost (AC) as the three key dimensions for each work package and control account.
Adaptive Approaches: In adaptive projects, EV can be calculated using story points—EV represents story points for user stories considered done at the end of an iteration.

Typical PMI Exam Example

A project manager is reviewing performance at the end of week 4. The planned value (PV) for this week is $50,000. The team completed work worth $45,000 in authorized budget terms. The actual cost incurred was $48,000. The project manager calculates EV incrementally for week 4 as $45,000. To assess whether the project is trending toward a budget overrun, the project manager then calculates cumulative EV across all 4 weeks and compares it to cumulative PV and cumulative AC.

PMI Exam Traps

Trap: Confusing EV with actual cost (AC) or physical progress. Reality: EV is expressed in budget terms (authorized budget for completed work), not actual money spent or percentage of tasks done.
Trap: Assuming EV can exceed PV for a component. Reality: EV cannot be greater than the authorized PV budget for a component. This is a PMBOK constraint.
Trap: Thinking incremental monitoring and cumulative monitoring serve the same purpose. Reality: Incremental EV determines current status; cumulative EV determines long-term performance trends. Both are required.
Trap: Confusing EV with PV when interpreting "work performed." Reality: PV is the budget for scheduled work (what should have been done). EV is the budget for completed work (what was actually accomplished).

Important PMI Connections

Related Concept	Relationship Type	Exam Attention Point
Planned Value (PV)	Complementary dimension	PV defines work that should have been accomplished; EV measures work actually accomplished. Both are expressed in budget terms.
Actual Cost (AC)	Complementary dimension	AC is the realized cost incurred for work performed. AC has no upper limit—whatever is spent to achieve EV will be measured.
Performance Measurement Baseline (PMB)	Foundation for EV	The PMB is the total PV over the project life. EV must be measured relative to this baseline.
Budget at Completion (BAC)	Total project budget	BAC = total PV for the project. EV is measured against the authorized budget, which is part of BAC.
Story Points (Adaptive)	Alternative EV calculation	In adaptive approaches, EV represents story points for user stories considered done at the end of an iteration.

Quick Review Questions

A project has a PV of $100,000 for a control account. The team has completed work representing $95,000 in authorized budget. What is the EV, and can it be greater than $100,000?
A project manager calculates EV for the current week as $12,000 and cumulative EV as $85,000. What does each value tell the project manager about project performance?
In an adaptive project using story points, what does EV represent at the end of an iteration?
A project manager finds that EV equals PV for a given work package. What does this indicate about the work scheduled versus the work completed?
If AC is $60,000 and EV is $55,000 for the same period, what can the project manager conclude about cost performance?

PMBOK v8 Reference

Section 2.7.2 – Performance Measurement Baseline (EVM Dimensions: Planned Value, Earned Value, Actual Cost)