Change ManagementIntermediate6 min read

Prosci 3-Phase Process

The Prosci 3-Phase Process is the project-level scaffolding that pairs with ADKAR (which is individual-level). Phase 1 — Prepare Approach: assess change characteristics, organizational attributes, sponsor strength, and impact. Phase 2 — Manage Change: design and execute communications, sponsor activities, coaching, training, and resistance plans. Phase 3 — Sustain Outcomes: review performance, activate sustainment, and transfer ownership. Prosci's research across 2,000+ projects shows that initiatives with excellent change management are 7x more likely to meet objectives than those with poor change management. The Prepare phase is where most rollouts secretly fail — teams skip it to look fast, then spend 3x more in the Manage phase fighting resistance they could have predicted.

Also known asProsci MethodologyPrepare Manage SustainProsci Change Management Process

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The Trap

The trap is treating Prepare as paperwork. Project managers compress Prepare into a one-week 'kickoff,' rush into Manage to start visible activity, and skip Sustain entirely because the funding ran out and 'the change is live.' The result: a successful go-live followed by 6-12 months of slow regression to old behaviors. Prosci's data shows that more time in Prepare correlates strongly with adoption, while more time in Manage without Prepare often correlates negatively (you're managing the wrong things). And Sustain is where ROI is realized — a change that goes live but isn't sustained delivers maybe 30% of projected value.

What to Do

Allocate budget by phase using Prosci's research-backed ratios: roughly 25% Prepare, 50% Manage, 25% Sustain. In Prepare: complete the change characteristics profile (size, complexity, type) and the organizational attributes assessment (capacity, history, culture). Identify your sponsor coalition and confirm they'll do the work — not just lend their name. In Manage: build five concrete plans (communications, sponsor, coaching, training, resistance). In Sustain: define success metrics tied to business outcomes (not just project completion), assign an owner past go-live, and run reinforcement reviews at 30/60/90/180 days. KnowMBA POV: every initiative should have a named Sustain owner before Manage begins — otherwise the moment go-live happens, the org reverts.

Formula

Change Success Probability = Prepare Quality × Manage Quality × Sustain Quality — Prosci research correlates 'excellent' across all three with 88% objectives-met rate, vs 13% for 'poor'

In Practice

Prosci's published research, drawing from 2,000+ change projects across 80+ countries (Best Practices in Change Management benchmarking, ongoing biennial editions), shows a near-linear relationship: projects that rated their change management as 'excellent' met or exceeded objectives 88% of the time. Projects rated 'poor' did so only 13% of the time. The biggest differentiator across cohorts is not training quality or comms volume — it's whether the project completed a structured Prepare phase before announcing the change. Companies that adopted the 3-Phase Process reported a measurable shift in resistance management: from reactive (firefighting) to proactive (designing for predicted resistance points).

Pro Tips

01
Prepare phase rule of thumb: if you can't fill out the change characteristics profile in detail (size, scope, type, complexity, who's affected, how much disruption), you don't have enough information to start Manage. Forcing Manage on a thin Prepare is what generates 'we didn't see this coming' surprises.
02
Sustain is the most under-funded phase in every change project. Budget runs out at go-live. Add Sustain budget at the START of the project (not as 'we'll figure it out later') — typically 20-30% of the total change management budget.
03
The 'sponsor' role in Prosci is not symbolic. The primary sponsor must do three specific behaviors: (1) actively participate visibly throughout the project, (2) build a coalition of sponsorship across peers, and (3) communicate directly with employees about the change. If your sponsor won't commit to these, the change will fail regardless of how good the plans are.

Myth vs Reality

Myth

“Prosci is just a methodology — any structured approach would work the same”

Reality

What makes Prosci differentiated is the research base. The 3-Phase Process and ADKAR are validated against 2,000+ projects with measurable outcomes. Other methodologies (Kotter, Lewin, McKinsey) are valuable models, but they're not equally validated with adoption data. If you're going to pick one operating system for change, the data favors Prosci.

Myth

“The Prepare phase slows down projects”

Reality

It looks slower in the first 30 days but reduces total project duration by 20-30% because you avoid the rework cycles that come from launching unprepared. Most 'fast' change projects are actually slower when you measure end-to-end including the post-launch firefighting.

Myth

“Sustain is just 'making sure people keep using the new system'”

Reality

Sustain has three structured activities: (1) review performance against the change objectives, (2) activate sustainment mechanisms (recognition, accountability, system enforcement), and (3) transfer ownership from the change team to operational owners. Without all three, the change drifts back to baseline within 6 months.

Try it

Run the numbers.

Pressure-test the concept against your own knowledge — answer the challenge or try the live scenario.

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Knowledge Check

Your team has 12 weeks and a $300K budget for a change initiative affecting 800 people. According to Prosci's recommended phase allocation, roughly how should you split the budget across the 3 phases?

Industry benchmarks

Is your number good?

Calibrate against real-world tiers. Use these ranges as targets — not absolutes.

Project Outcome by Change Management Quality

Cross-industry, n=2,000+ projects

Excellent CM — meets/exceeds objectives

88% of projects

Good CM

77% of projects

Fair CM

44% of projects

Poor CM

13% of projects

Source: Prosci Best Practices in Change Management benchmarking research

Real-world cases

Companies that lived this.

Verified narratives with the numbers that prove (or break) the concept.

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Prosci Research Corpus

2003-2024 (biennial benchmarking)

success

Prosci's biennial Best Practices in Change Management research has tracked 2,000+ change projects across 80+ countries since 1998. The data is the largest validated dataset on what actually moves the needle on change adoption. Key findings: projects with active and visible sponsorship are 3.5x more likely to meet objectives. Projects following a structured methodology are 6x more likely to succeed than ad-hoc efforts. Projects that complete the Prepare phase well are 7x more likely to meet objectives than those that skip or rush it. The 3-Phase Process is the operationalization of these findings.

Projects studied

2,000+ across 11 study iterations

Excellent CM → objectives met

88%

Poor CM → objectives met

13%

Active sponsor → success multiplier

3.5x

The biggest insight from 25 years of Prosci research isn't a specific technique — it's that structured change management has a measurable, repeatable effect on outcomes. Companies that treat change as a discipline (with phases, roles, and metrics) outperform companies that treat it as project management with extra meetings.

Source ↗

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Hypothetical: Mid-Market Insurance Co.

2024 Claims System Modernization

success

A 2,800-person insurance company replaced its 20-year-old claims platform. The first attempt skipped the Prepare phase ('we know our people'), spent $4M on the Manage phase (training, comms, change agents), and went live in month 9. Adoption peaked at 52% then drifted to 38% by month 14. The CFO froze the second wave. A new change lead restarted with a real 6-week Prepare phase: change characteristics profile, organizational attributes assessment (revealing high change saturation in the claims org), sponsor coalition mapping (revealing the COO was opposed but had hidden it). The redesigned Manage phase addressed the actual barriers. Sustain phase (newly funded at $400K) included a 12-month performance review cadence and embedded super-users. Adoption hit 84% by month 6 of the second attempt and held.

Attempt 1 adoption (post-launch)

52% peak, 38% drift

Attempt 1 cost

$4M (mostly wasted)

Attempt 2 Prepare investment

$300K / 6 weeks

Attempt 2 sustained adoption

84% at month 6

The first attempt failed not because of bad execution in Manage, but because Prepare and Sustain were skipped. The second attempt cost less in absolute dollars (smaller Manage spend, properly funded Prepare and Sustain) and delivered 2x the adoption. Phase allocation matters more than absolute budget.

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