Agile Practice Guide – Second Edition: What Changed, and What It Means for Your PMI-ACP Prep

On 2 September 2026, PMI and Agile Alliance released the second edition of the Agile Practice Guide — the first update since the original launched in 2017. If you’re prepping for the PMI-ACP, holding a PMP and trying to stay current, or just trying to figure out whether agile training material you bought two years ago is now out of date, this update matters more than a routine reprint.

Nine years is a long time in agile practice. The first edition was written before remote-first teams were normal, before generative AI sat in on planning sessions, and before “product thinking” became the default way most teams talk about their work. The second edition doesn’t replace agile fundamentals — it catches the guide up to how teams actually operate now, and it does that in a way that directly touches the current PMI-ACP Examination Content Outline (ECO) and the PMBOK Guide – Eighth Edition.

Below is a breakdown of exactly what changed, why PMI made these changes now, and — more usefully — what a PMI-ACP candidate, PMP holder, or working agile practitioner should actually do about it.

What Is the Agile Practice Guide, and Why Does It Matter?

The Agile Practice Guide is PMI’s framework-neutral introduction to agile ways of working, developed jointly with Agile Alliance. “Framework-neutral” is the operative phrase: it doesn’t tell you to run Scrum or Kanban specifically — for a primer on how those frameworks actually differ day to day, see our Scrum vs. SAFe comparison. It teaches the underlying agile mindset and lets you choose the framework that fits your context.

That neutrality is also why it sits at the center of PMI-ACP exam prep. The PMI-ACP doesn’t test you on any single methodology — it tests whether you understand agile principles well enough to apply them across Scrum, Kanban, XP, Lean, and hybrid environments. The Agile Practice Guide is the reference material built to teach exactly that kind of framework-agnostic thinking, and it’s explicitly listed as recommended reading on PMI’s own PMI-ACP exam preparation page.

First Edition (2017) vs Second Edition (2026): What Actually Changed

The short version: the first edition assumed a fairly narrow definition of “agile team” — mostly co-located, mostly software, mostly hybrid-vs-predictive as a binary choice. The second edition throws that assumption out, treating hybrid the way our own Agile vs. Predictive breakdown has long argued it should be — as a spectrum, not a switch.

If you trained for PMI-ACP using material built around the first edition, none of your foundational agile knowledge is wrong — but four topic areas (product management, AI, scaling frameworks, and psychological safety) are now covered in far more depth than most 2023–2024-era prep courses included.

Three Buckets of Change: Practice, Social, and Strategic

PMI organizes the update into three categories, and it’s a genuinely useful way to think about what to prioritize in your own study or team rollout.

Practice changes are the mechanical, day-to-day updates: the hybrid continuum replacing the old binary, refreshed terminology, and — new in this edition — a GenAI callout at the end of every chapter. If you’re studying for an exam, this is the bucket most likely to show up as new vocabulary in exam questions.

Social changes shift the tone around how teams function. Psychological safety moves from a soft-skill mention to a stated precondition for team performance — the logic being that people only surface real problems and ideas when they feel safe doing so. Sustainability is broadened well past “don’t burn out your developers” into decisions that affect people, environmental impact, and the organization’s ability to keep operating this way long-term.

Strategic changes are the ones that matter most if you work anywhere near a PMO or transformation initiative. The guide now explicitly acknowledges that scaling frameworks (SAFe, LeSS, Scrum@Scale, Disciplined Agile) are mainstream rather than niche — a shift we’ve tracked in our own guide to scaling agile in an organization — and it introduces “enterprise agility” as the organizational layer that surrounds individual agile teams, pointing toward PMI’s Manifesto for Enterprise Agility and the M.O.R.E. principles from PMBOK 8 for readers who want to go further.

The Real Headline: Product Management Is Now Baked Into Agile

If you only take one thing from this update, take this: product management thinking is no longer treated as adjacent to agile — it’s now integrated directly into how the guide teaches agile delivery.

The reasoning tracks with what’s actually happening on the ground. Teams increasingly own a product continuously rather than deliver a project and disband, so the guide’s vocabulary and structure have shifted to match. It brings in two disciplines that are explicitly not agile methods but are commonly used alongside agile delivery:

• Design thinking — customer-centric, empathy-driven development that uses low-fidelity prototypes to get feedback while changes are still cheap to make.
• Lean Startup — treating every new idea as a testable hypothesis, using MVPs, A/B testing, and build-measure-learn loops to validate direction before spending further budget.

The guide also expands into go-to-market considerations, product life-cycle phases, and how product management functions as both a role and a discipline running alongside project delivery.

For anyone holding — or pursuing — a Product Owner credential alongside PMI-ACP, this is the section to read closely. If you’re weighing how a Product Owner’s responsibilities differ from a Product Manager’s day to day, our Product Owner vs. Product Manager guide breaks that down. It’s the clearest signal yet that PMI sees the agile-and-product skill sets converging, not staying in separate lanes.

What This Means If You’re Studying for PMI-ACP

The current PMI-ACP Examination Content Outline tests four domains: Mindset, Leadership, Product, and Delivery. Look at that list again next to what changed in the guide — the overlap isn’t a coincidence.

• Product domain: This is the domain most directly reshaped by the second edition’s expanded product-management content. If your prep material predates September 2026, it likely underweights design thinking, Lean Startup concepts, and product life-cycle material relative to what the current reference guide now covers.
• Mindset domain: Psychological safety’s elevation from “nice-to-have” to baseline requirement is squarely mindset-domain territory, and a natural source for new scenario-based exam questions.
• Leadership domain: The enterprise agility material — culture assessment, team structures, agile PMO evolution — feeds directly into how PMI frames servant leadership at scale.
• Delivery domain: The shift from output metrics to genuine flow metrics, Goal Question Metric (GQM) thinking, and OKRs is new measurement guidance a Delivery-domain question could reasonably draw on.

Practically, this doesn’t mean your existing prep is obsolete. It means that if you’re studying between now and your exam date, it’s worth explicitly checking whether your course materials have been updated since September 2026, particularly around product-management terminology and measurement frameworks — the two areas that expanded the most.

What This Means If You’re PMP-Certified or PMBOK-Focused

The second edition is explicitly aligned to the PMBOK® Guide – Eighth Edition, referencing its sustainability principles and M.O.R.E. framework directly. If you’ve already updated your PMP knowledge for PMBOK 8, the Agile Practice Guide’s second edition is the natural companion piece — it fills in the agile-specific depth that PMBOK 8 references but doesn’t fully unpack on its own.

It’s also relevant if you sit anywhere near a PMO. PMI’s own research (cited in the guide’s release) found that 85% of C-suite executives consider enterprise agility critical, yet 65% have only partially implemented it or not at all. That gap between stated priority and actual execution is exactly what the guide’s new organizational chapter — covering culture assessment, team structures, lean portfolio management, and the agile PMO’s evolving role — is trying to help close. If part of your role involves translating agile delivery into something leadership can see the value of, that chapter is worth your time even if you never sit the PMI-ACP exam.

Should You Actually Read the Full Guide?

Short answer: yes, if you’re actively preparing for PMI-ACP or leading agile teams — but you don’t need to read it cover to cover in one sitting.

• If you’re PMI-ACP prepping: Prioritize the product management chapter and the updated metrics section (flow metrics, GQM, OKRs) first — these are the newest and least likely to be covered in older prep material.
• If you’re a working Scrum Master or Agile Coach: The psychological safety and sustainability sections are short but directly useful for how you’re facilitating teams day to day.
• If you’re in a PMO or leadership role: Go straight to the organizational and enterprise agility chapter — that’s where the guide talks your language.
• If you already hold PMI-ACP: You don’t need to re-certify or panic. Use the guide as a refresher for the terminology and concepts that have shifted since you last studied, particularly if it’s been a few years.

PMI members can access a digital copy through PMI at no additional cost; a paperback second edition is also available through PMI’s store and standard retailers.

Key Takeaways

• The Agile Practice Guide – Second Edition, released 2 September 2026, is the first update since 2017 and stays framework-neutral by design.
• The biggest single change is the deep integration of product management thinking — design thinking, Lean Startup, and product life-cycle content — directly into agile guidance.
• Terminology has shifted (backlog refinement, daily coordination meeting), hybrid is now a continuum rather than a binary, and every chapter includes GenAI guidance.
• Scaling frameworks (SAFe, LeSS, Scrum@Scale, Disciplined Agile) and enterprise agility now get explicit, dedicated coverage.
• It’s aligned to the PMBOK Guide – Eighth Edition, making it the natural companion for both PMI-ACP and PMP holders.
• If you’re studying for PMI-ACP right now, check that your prep material reflects this update — particularly in the Product and Mindset domains.

Preparing for the PMI-ACP exam? ShriLearning’s PMI-ACP training is built around the current Examination Content Outline — including the product-management and metrics updates covered above.