rootbrowseIAC-23D1session 55. Lessons Learned in Space Systems: Achievements, Challenges, Best Practices, Standards.Papers1. Best Practices and Lessons learned on Product and Quality Assurance actions on CubeSat missions: the Sapienza S5Lab study case2. The study on the reliability increasing of newly developed space technology3. lessons learned and best practices from the birds-5 project4. The effect on the iterative design approach of different Starlink satellite generations and versions as seen by the apparent brightness characteristics5. Lessons Learned with Risk Management: a Systems Engineer’s perspective6. Spacecraft digital engineering: the tale of “digital twins” and lessons learned7. Standardizing CubeSat Interiors: Safeguarding Missions and Advancing the Market8. The effects of the design on the Satellite Refueling System efficiency.9. The Practice of Reducing Cost in the Development of Smallsats10. JAXA's Systems Engineering/Project Management Reforms and Best Practices in Hayabusa2 Mission