From learningcircuits.blogspot.fr - March 27, 2012 2:23 AM

A large percentage of learning and skill building is done informally. Estimates show that upwards of 90% of workplace learning takes place outside of formal programs. Most actual learning takes place informally on-the-job, through coaching, mentoring, experience, and other sharing. This learning doesn't go through the training department, and it isn’t tracked by the organization’s learning management system.