Encyclopedia — Letter E
9 entries in Project Management & Project Controls beginning with E.
Earned Schedule
A time-based extension of earned value that converts schedule performance into units of time, fixing EVM's well-known late-project blind spot.
Earned Value Management (EVM)
An integrated cost-schedule-scope measurement technique that compares planned, earned, and actual values to reveal project performance and forecast outcomes.
Ephemeral Preview Environment
A short-lived, per-branch or per-pull-request deployment that lets reviewers see and test changes in isolation — the practice that quietly cuts review cycles in half.
Epic
A large body of work in agile delivery that delivers significant business value but is too big for a single sprint — decomposed into features and user stories that flow through the team over weeks or months.
Error Budget
The maximum acceptable unreliability of a service in a period, derived from its SLO — the governance mechanism that lets SRE teams balance velocity with reliability.
Error Budget Policy
The explicit, negotiated agreement between engineering and product that says what happens when reliability drops — the mechanism that turns SLOs from posters into decisions.
Estimate at Completion (EAC)
A forward-looking forecast of the total cost (or duration) of a project at completion, derived from current performance data and assumptions about future performance.
Excavation Support Design
The engineered system — sheet piles, secant walls, soldier piles, propping or soil nailing — that keeps the sides of a deep excavation, and everything above them, in the position the design demands.
Extension of Time
A contractual entitlement that pushes the completion date when delay events outside the contractor’s control consume float on the critical path.
Frequently Asked Questions
What encyclopedia entries are listed under the letter E?
9 project management and project controls entries beginning with E, including Earned Schedule, Earned Value Management (EVM), Ephemeral Preview Environment. The full A–Z reference is at the PMMilestone Encyclopedia.How are letter-paginated encyclopedia pages organised on PMMilestone Research & Insights?
Each letter page lists every entry whose primary term starts with that letter, sorted alphabetically. Entries are research-grade — definition, principles, applications, related entries and FAQs — written by Dr. Hassan Eliwa, PhD, Founder of PMMilestone.org.Which calculators and templates pair with letter E entries?
Most entries cross-link to companion tools on the flagship platform — the EVM Calculator, SPI Calculator, CPI Calculator, Schedule Health Checker and Risk Register Template. Each individual entry FAQ block names the specific calculator that applies.Where can I look up a one-line definition instead of the full encyclopedia entry?
Use the PM Glossary on PMMilestone.org for single-line definitions. The encyclopedia here is the long-form, citation-grade reference.