'I would say that for the amount that it costs, it's a huge piece of leverage. Compared with training, it’s enormous value for money. And, compared with the permanent impact it has, because of the way it works, it has got a much longer life on it. So from a business point of view, if you're looking at this in terms of business case, the invest cost at the start of the process is lower and you've got a longer return period on it. Some training you do only has a return period of a month. This can last forever.'