Karin PitmanProject Manager| Central New Mexico Community CollegeAlbuquerque, NM, United States
Has anyone created a centralized Lessons Learned Repository for their PMO and/or does anyone have recommendations of a template that can be used and/or a recommended format? Up to now, we have Lessons Learned stored for each project, but it seems more useful to set something up that can be used by all.
Senior Projects Manager | Field & Marten AssociatesNew Westminster, British Columbia, Canada
Karin, we implemented a centralized Lessons Learned repository using a simple Excel workbook. Each project contributes to the same file, with standardized fields and filters for project name, phase, category (e.g., scope, schedule, risk, vendor, governance), and lesson type (what worked / what didn’t / recommendations).
This allows the PMO and project teams to easily sort, filter, and search across projects rather than reviewing lessons in isolation. While it’s a fairly “old-school” solution, it’s lightweight, easy to maintain, and actually gets used which was more important to us than adopting a more complex tool.
The key was consistent categorization and ownership to ensure lessons are reviewed and updated, not just archived.
While moving to a centralized repository is a step in the right direction, you'll need to ensure there is effort spent by either PMs or a PMO staffer taking "raw" lessons at the end of a project and curating/scrubbing them such that they will be a valuable addition to the repository. This includes things such as adding in sufficient context surrounding the lesson.
I'd also recommend adding a upvote/like flag for each lesson so that folks who search for it and find it useful can indicate that which will help in culling low value or stale lessons.
I did a webinar for this community on this topic a few years back which is accessible as a free on-demand offering - you may wish to search for it using the key word "lesson".
Kiron
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1 reply by Karin Pitman
Jan 20, 2026 10:27 AM
Karin Pitman
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Thank you for your response and recommendations. I'll look for that webinar!
In it, I describe the approach I came up with when helping stand up a new PMO. At my employer to that one, we had a SharePoint repository of lessons learned documents going back several years. It was difficult, to say the least, to find useful information. I realized that most of the information captured wasn't needed beyond the current project, so I took an approach that focused more on actionable lessons that could be managed from one page. It may not be a perfect fit for your org, but hopefully it helps you come up with something effective that works well for your team.
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1 reply by Karin Pitman
Jan 20, 2026 10:28 AM
Karin Pitman
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Thanks for your response and the link--I'll check it out.
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Sergio Luis ConteHelping to create solutions for everyone| Worldwide based OrganizationsBuenos Aires, Argentina
I always create this environment taking into account Knowledge Management Systems, where system is not a synonym of software. But today, with generative AI in place, everything changed. It is easy to create an environment using generative AI supported by some LLM and adding the own organization infomraiton by using things like RAG.
Program Manager| HARPER SRLSanto Domingo / Distrito Nacional, Dominican Republic
Karin, you can centralized lessons in one place with a few consistent fields: context, what happened, impact, and what we’d do differently next time. The key wasn’t the tool, but having someone (PMO or rotating owner) review and clean lessons before adding them, so they’re understandable outside the original project. If lessons aren’t searchable, reusable, and reviewed periodically, they quickly turn into an archive instead of a learning asset.
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1 reply by Karin Pitman
Jan 20, 2026 10:29 AM
Karin Pitman
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Thanks for your response and recommendations.
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Luis BrancoCEO| Business Insight, Consultores de Gestão, LdªCarcavelos, Lisboa, Portugal
A centralized Lessons Learned repository only adds value if it operates as a learning system, not as a static archive. To keep it effective, a few principles matter. Organize lessons around themes and decision patterns rather than individual projects. Projects provide context, but they should not be the primary structure. Focus on insight, not narration. Each lesson should clearly explain what happened, why it happened, and what should be done differently next time. Finally, embed the repository into PMO routines such as reviews, onboarding, and portfolio discussions.
If lessons are not actively reused, centralization becomes documentation without learning.
Technology can amplify reuse and discovery, but it never replaces the discipline of turning lessons into shared decision guidance.
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1 reply by Karin Pitman
Jan 20, 2026 10:30 AM
Karin Pitman
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Thank you. I appreciate your response and recommendations.
If we take a structured and disciplined approach to a Lessons Learned Repository a) keeping the format simple, b) making lessons learned a mandatory deliverable for every project, and c) reviewing them regularly to “connect the dots.”
We create a strong foundation for continuous process improvement - in this setup, we can use lean Six Sigma tools and practices, such as Kaizen events, Gemba walks, and A3 problem-solving, to improve the organization's processes.
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1 reply by Karin Pitman
Jan 20, 2026 10:31 AM
Karin Pitman
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Thank you, yes. Right now, everyone puts their lessons learned in each project, but that makes it very cumbersome to review. I had suggested we create an alternate system, so wanted to ask for recommendations before trying to create something. Thanks again.
Yes, a centralized lessons learned repository is very useful for PMOs. A simple format works best project name, issue, root cause, lesson learned, and recommendation. Keeping it searchable by category or phase helps teams reuse insights across projects. The key is making it easy to update and actually use.
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1 reply by Karin Pitman
Jan 20, 2026 10:31 AM
Karin Pitman
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Thank you for the comment and your insight.
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Karin PitmanProject Manager| Central New Mexico Community CollegeAlbuquerque, NM, United States
Jan 16, 2026 4:32 PM
Replying to Sergio Luis Conte
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I always create this environment taking into account Knowledge Management Systems, where system is not a synonym of software. But today, with generative AI in place, everything changed. It is easy to create an environment using generative AI supported by some LLM and adding the own organization infomraiton by using things like RAG.
Thank you for your response. What's RAG?
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2 replies by Aung Sint and Sergio Luis Conte
Jan 20, 2026 11:18 AM
Aung Sint
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I believe it relates to Red, Amber, and Green, similar to traffic light indicators, to distinguish the importance of lesson learned entries.
Jan 24, 2026 6:34 AM
Sergio Luis Conte
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You are welcome. Retrieval-Augmented Generation (RAG) is an AI framework that enhances Large Language Model (LLM) accuracy by retrieving data from external, trusted knowledge sources—like company databases or documents—before generating a response. It reduces hallucinations and provides up-to-date information, allowing models to cite sources without needing costly retraining. It is mainly used with generative AI solutions.
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Karin PitmanProject Manager| Central New Mexico Community CollegeAlbuquerque, NM, United States
Jan 14, 2026 7:27 PM
Replying to Rami Kaibni
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Karin, we implemented a centralized Lessons Learned repository using a simple Excel workbook. Each project contributes to the same file, with standardized fields and filters for project name, phase, category (e.g., scope, schedule, risk, vendor, governance), and lesson type (what worked / what didn’t / recommendations).
This allows the PMO and project teams to easily sort, filter, and search across projects rather than reviewing lessons in isolation. While it’s a fairly “old-school” solution, it’s lightweight, easy to maintain, and actually gets used which was more important to us than adopting a more complex tool.
The key was consistent categorization and ownership to ensure lessons are reviewed and updated, not just archived.
Thank you for your response and insight. Saving Changes...
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