Since each session takes ½ a day and has 20 employees, it costs your company 10 person days of lost productivity. If an average employee costs €500 / day, the each training session costs your company €5000 in lost time. So, over 50 such sessions you've just lost €250,000.
Yes, you will say "This isn't a loss. It's an investment". Sure. But in today's world of cost cuttings and tight budgets you could get the same end result with a much lower investment if you were to replace the planned classroom training session with an eLearning session. We have demonstrable evidence of projected cost reduction of as great as 70% achieved by our clients with the use of eLearning.