550 words (4 minutes reading time) by Tim Whistler

Credit

Lancing has highlighted a key problem with many council services. I used to call it the ‘lowest common denominator effect’ (i.e. performance gets reduced to the lowest level tolerated) but I think the Taguchi Loss Function makes the point in a way that helps you to fix the problem.

Imagine that the diagram Lancing used to show the target value that a customer or citizen wants as fitting between two ‘goal posts’, to instead show a set of Australian Rules football goals. For those non-Australians, I have helped you imagine that with the diagram below.

If you aren’t aren’t familiar with Australian Rules football, when the ball is kicked between the two centre posts it is a goal and scores 6 points. If it is kicked between a centre post and the post either side, it is called a behind and scores 1 point. If the ball is kicked outside all the goal posts it is out of bounds on the full and there is no score and the opposition gets to kick the ball back into play.