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Lessons Learned Information System

A lesson learned is knowledge or understanding gained by experience and can be derived from a successful or unsuccessful mission or project. Lessons learned are important to future programs, projects and processes because they show insights from previous projects or processes. Sharing lessons learned promotes the recurrence of desirable outcomes and helps prevent the recurrence of undesirable outcomes. NASA project teams are responsible for accessing local or agencywide lessons learned databases for relevant lessons during project planning and throughout the project life cycle. Project teams are also directed to record lessons learned in the agency database throughout the project life cycle and at the end of major systems engineering processes, key decision points and technical reviews.

At NASA, the Lessons Learned Information System (LLIS) is the primary tool for sharing lessons learned. The LLIS enables the agency’s workforce to find and share knowledge easily and broadly, enabling project teams to learn from one another’s on-the-job experiences and recommendations for managing and mitigating project risk. LLIS, NASA’s main lessons learned database, sits behind a firewall in the NASA Engineering Network (NEN) portal and is accessible only to the NASA workforce.

NASA employees using LLIS are able to:

  • Seamlessly search more than 20 NASA repositories using keywords of
  • Compile lessons by topic and/or discipline
  • Subscribe to receive notification of new lessons learned
  • Share lessons learned with team members
  • Add comments to lessons learned entries
  • Rate lessons learned entries
  • Find/contact lessons learned subject matter experts
  • Review 
and select knowledge gained from particular lessons learned
  • Determine how lessons from
 previous tasks impact risks to current projects and implement those lessons learned that
 improve design and/or performance

A significant lesson learned might change policy,
 standards or procedures. An LLIS entry:

  • Pertains to safety or mission success
  • Is likely to be relevant to other projects
  • Does not duplicate an existing lesson learned

A ready-to-use template guides LLIS users through the process of writing and submitting a lesson learned. LLIS users can easily attach photos, videos, documents, spreadsheets, presentations and PDFs to LLIS entries. Investigation reports, standards, procedures or any 
other pertinent documentation may be referenced in an entry. A list of related topics associated with the lesson may also be included.

Lessons available in the LLIS are occasionally presented in the form of case studies. Typically, the difference between a lesson learned and a case study is that lessons learned include recommendations whereas case studies may generate more questions than answers and are designed to prompt conversation, problem analysis and thinking through how decisions are made.

Knowledge Toolbox: Case Studies