A lessons-learned assessment is not an administrative closeout task. Used well, it is a change-management diagnostic that helps the change team understand whether people are actually moving toward adoption, where resistance or confusion is emerging, and which parts of the change approach need to be adjusted. Evaluation is most useful when findings are used for improvement and decision-making, not simply stored as evidence that a review occurred [CDC, 2024]. (cdc.gov)

This matters because organizational change depends on individual change. Prosci’s ADKAR model frames successful individual change through Awareness, Desire, Knowledge, Ability, and Reinforcement [Prosci ADKAR, n.d.]. (prosci.com) A lessons-learned review helps identify which of those conditions is weak for each impacted group, then turns the finding into updates to stakeholder engagement, sponsor actions, manager support, training, communications, reinforcement, and measurement.

This action is a structured review of what was intended, what is actually happening, why gaps exist, and what needs to change in the change management approach. It belongs in the category of diagnostic assessment and planning because it compares evidence against adoption goals and produces prioritized follow-up actions.

Use it after a pilot, at the end of a project phase, shortly after go-live, before the next deployment wave, when adoption metrics are off track, when resistance increases, or when managers report that employees are confused or reverting to old ways of working. APM cautions that waiting until the end of a project can reduce the quality of lessons because people have moved on and the exercise becomes “box ticking” [APM, n.d.]. (apm.org.uk) Prosci’s 3-Phase Process also includes tracking performance, adapting actions, reviewing ADKAR outcomes, documenting lessons learned, and activating sustainment actions [Prosci 3-Phase Process, n.d.]. (prosci.com)

Start by gathering the current change strategy, stakeholder and impact assessments, readiness data, adoption metrics, training attendance and proficiency results, help-desk or support themes, manager feedback, pulse-survey comments, communications analytics, and any open risks or issues. Include evidence from both the project team and impacted groups; employee voice can be formal or informal, and effective voice depends on multiple channels supported by leaders and line managers [CIPD, 2026]. (cipd.org)

Invite a practical mix of people: the sponsor or delegate, change manager, project lead, selected people managers, frontline representatives, training or HR partners, support leads, and change champions. Decide in advance which outputs can be changed: timing, training design, manager toolkits, communications, sponsor actions, readiness criteria, reinforcement mechanisms, or adoption metrics. If no one in the room can approve or escalate changes, the session will produce observations rather than improvement.

A company rolls out a new CRM to 300 sales employees. Two weeks after go-live, logins are high but opportunity updates are incomplete. Managers report that teams understand why the CRM matters, but they still use spreadsheets for pipeline reviews.

The change manager runs a 90-minute lessons-learned review with sales managers, champions, training, IT support, and the sponsor. The evidence shows strong Awareness and Knowledge but weak Ability and Reinforcement. The team updates the approach: sales managers receive a coaching guide, pipeline meetings must use CRM dashboards, quick-reference job aids are rewritten around real sales scenarios, the sponsor clarifies that spreadsheet reporting will be retired, and adoption metrics shift from “login rate” to “percentage of opportunities updated before weekly review.” This is practical guidance based on ADKAR diagnosis and adoption-measurement principles [Prosci ADKAR, n.d.; Prosci Change Management Success, n.d.]. (prosci.com)

The action is working when the review produces decisions, not just discussion. Useful indicators include: representative participation from impacted groups; documented findings by audience; action items with owners and due dates; updated change tools; reduced recurring resistance themes; improved readiness or ADKAR scores; faster adoption; higher utilization; stronger proficiency; fewer support tickets for known issues; and evidence that managers are reinforcing the new behavior. Prosci identifies speed of adoption, ultimate utilization, and proficiency as adoption measures once people reach the Ability stage [Prosci Change Management Success, n.d.]. (prosci.com)