Schedule & Cost Reserves within EIA-748

What reserves are in EVM

This lesson refines the PMB from Lesson 13. Within EVM's budget structure, not every dollar lives in the measured baseline: management reserve is set aside for risk, and undistributed budget is a staging area for work not yet planned in detail. Understanding where these sit — and that they're outside the PMB — is essential to reading EVM correctly.

How the total budget breaks down

EVM gives the project budget a precise structure, with reserve and undistributed budget held apart from the measured baseline:

Managing and releasing reserve

Reserve only earns its keep if it's managed, not raided. Sound practice mirrors the schedule-contingency discipline you met in Planning & Scheduling:

• Hold it visibly — MR is a known, tracked amount outside the PMB — not hidden inside control accounts.
• Release by process — Moving MR into the baseline requires a formal, documented decision — typically a baseline change.
• Track the balance — Watch the remaining reserve over time, like a contingency drawdown — burning it too fast is an early warning.
• Never use it to hide variance — MR covers genuine unforeseen in-scope work — not to mask an overrun by quietly topping up a failing account.

Using reserves well

Size management reserve from the project's risk (linking to the Risk & Contingency track), hold it clearly outside the PMB, release it only through a documented process for genuine in-scope needs, and track the remaining balance as a health indicator. Distribute undistributed budget into control accounts promptly as work is detailed, so the measured baseline stays complete.

Nine things to remember

1. Management reserve (MR) is budget held outside the PMB for in-scope unforeseen work.
2. Undistributed budget (UB) is authorized work not yet allocated to control accounts.
3. Reserve sits outside the PMB on purpose — to keep measurement honest.
4. Total budget = PMB + MR; within the PMB, distributed budget + UB.
5. MR is the EVM cousin of contingency — defined home, defined release process.
6. Hold reserve visibly and release it by formal process — never raid it casually.
7. Track the remaining balance — burning reserve too fast is an early warning.
8. Never use MR to hide a variance — that defeats the point of EVM.
9. Reserve discipline = honest EVM — it preserves baseline integrity.