A
Z
Free Reference Download Second Edition · 2026

The A—Z of Project Scheduling

The definitive 100-term reference for the modern construction planner. From Activity ID to Zero Float — every term that actually matters on a live programme, demystified in plain English.

Dr Adesegun Francis Osadare
Dr Adesegun Francis Osadare PMP · RMP · LLM · MSc · Author & Senior Planner
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AActivity ID BBaseline Variance CCritical Path DDCMA 14-Point EEarned Value FFree Float GGantt Logic HHammock IInterface Milestone JJust-In-Time KKey Float Metrics LLag & Lead MMonte Carlo NNEC4 Programme OOut-of-Sequence PProductivity Rate AActivity ID BBaseline Variance CCritical Path DDCMA 14-Point EEarned Value FFree Float GGantt Logic HHammock IInterface Milestone JJust-In-Time KKey Float Metrics LLag & Lead MMonte Carlo NNEC4 Programme OOut-of-Sequence PProductivity Rate
Dr Adesegun Francis Osadare in graduation regalia
Doctorate

Dr Adesegun F. Osadare

PMP · RMP · LLM · MSc

Senior Construction Planner on a UK Tier 1 nuclear new-build programme. Founder of The True Troop Consulting Ltd and the P6 Pro Academy. Author of The Float Handbook and the A to Z of Project Scheduling.

40+ Cohorts Run
15+ Years on Site

Written by a planner who has actually scheduled the work.

This isn't a textbook glossary lifted from PMI standards and reshuffled for clicks. Every entry has been pressure-tested on live programmes — from civils to mechanical, electrical and instrumentation — across some of Britain's largest active infrastructure deliveries.

You'll find the standards (AACE, PMI, NEC4, SCL Protocol, DCMA) woven through, but the language is plain, the examples are real, and the judgement is hard-earned.

i.
Standards-Aligned
AACE RP, PMI PMBOK, NEC4 & SCL Protocol referenced throughout.
ii.
Practitioner-Tested
Drawn from 15+ years on UK nuclear, rail and infrastructure programmes.
iii.
Built to Use
Designed as a desk-side companion, not a coffee-table read.
Inside the Second Edition

Every letter. Every term that matters.

A taste of the alphabet. Each entry comes with a definition, an industry-standard reference, and a worked example you can cite in an interview, a claim, or a director's review.

A.
04 Entries
  • Activity & Activity ID
  • Actual Cost (AC)
  • AACE Recommended Practice
  • Acceleration
B.
04 Entries
  • Baseline Schedule
  • Bar Chart (Gantt)
  • Buffer & Contingency
  • Backward Pass
C.
05 Entries
  • Critical Path Method
  • Cost & Schedule Variance
  • Calendar (P6)
  • Concurrent Delay
  • Cash Flow Curve
D.
04 Entries
  • DCMA 14-Point Check
  • Delay Analysis (TIA)
  • Duration (Original / Remaining)
  • Driving Activity
E.
04 Entries
  • Earned Value (EV)
  • Estimate at Completion
  • Early Start / Early Finish
  • EWN (Early Warning Notice)
F.
04 Entries
  • Free Float vs Total Float
  • Forensic Schedule Analysis
  • Forecast Date
  • Float Consumption Rate
M.
04 Entries
  • Milestone (Hard / Soft)
  • Monte Carlo Simulation
  • Mitigation Plan
  • Master Schedule
Z.
02 Entries
  • Zero Float (Critical)
  • Zero-Day Delay Concept
…and 22 more letters, totalling 100 carefully curated terms.
Free download. No upsells. Just the reference you'll keep open.
Who It's Written For

Three planners. One desk-side companion.

Whether you're stepping onto your first programme or defending a £20M extension of time, this glossary closes the gap between what you know and what you need to say.

i.

The Graduate Planner

You're new to the trade and tired of nodding through technical reviews. This builds your foundation in the language of the schedule — the same vocabulary your director uses on a Friday call.

0–3 yrs Foundation Interview-Ready
ii.

The Senior Scheduler

You know the work. You need a sharpened reference for risk, tender, and assurance reviews — terms cross-walked to NEC4, AACE, and PMI in one consistent voice you can hand to a junior.

5–15 yrs Reference Team-Wide
iii.

The Delay Analyst

You build claims for a living. The forensic chapter alone — concurrent delay, TIA, windows analysis, SCL Protocol vocabulary — pays for the time it took to download.

Claims SCL Aligned Expert Witness
What's New in the 2nd Edition

Rewritten for today's planner.

The first edition was a foundation. The second is a working tool — sharper definitions, contemporary references, and the contractual vocabulary that actually shows up on a UK programme in 2026.

i

Expanded NEC4 Vocabulary

Compensation Events, Early Warnings, Programme acceptance under Clause 31 & 32 — clarified for planners, not lawyers.

ii

Forensic & SCL-Aligned Terms

Time Impact Analysis, Windows Analysis, As-Planned vs As-Built — written in the language of expert witness reports.

iii

AACE Recommended Practice Cross-References

RP-29R, RP-52R, RP-89R and RP-90R highlighted where they apply — so you can cite the standard, not just the term.

iv

AI-Era & Digital Twin Vocabulary

Data-driven scheduling, prospective delay analysis, integrated 4D — terms entering tender documents you'll need to defend.

v

UK Infrastructure Worked Examples

Real situations from nuclear, rail and major civils — anonymised, but rooted in lived programmes.

vi

Director-Level Reporting Language

How to phrase variances, productivity, and recovery for a senior audience — the missing skill graduates struggle with.

“

A schedule is only as strong as the language used to defend it. This book sharpens the language.

From the Author's Foreword

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