Every construction project generates knowledge: lessons learned in the field, submittals and specifications worked through in design reviews, and RFIs that clarify how to build smarter. Yet, when a job is completed, much of that hard-earned wisdom vanishes—lost in inboxes, outdated folders, or disconnected drives. This phenomenon—what some call the knowledge drain—costs contractors more than just time. It leads to redundant work, missed insights, and costly rework.