[[video:95]] Have you ever struggled to explain something which you easily know how to do? Performing the action is so familiar, and yet so hard to put into words. Or perhaps you’ve experienced the opposite phenomenon: you sketch and write to make a design problem clear to yourself… and you end up with a crystal-clear description of a solution which you didn’t think you had the knowledge needed to come up with when you first started.

Much of our own knowledge, and that of our clients and users, is not uncovered. It lies ‘buried’ deep within us, but we can access it. In other words, it’s tacit. We can apply that tacit knowledge, but we struggle to articulate precisely what it is. Sometime...