Tag Archives: variation

The man who mistook his wife for an actual change in performance

There was once a man who mistook his wife for a hat. This is his wife. This is a hat. He thought Why did he think that? He had a brain injury. The injury affected the way his brain processed … Continue reading

Posted in data, experiment, measures, systems thinking | Tagged , , , , | 2 Comments

There really is only one test!

Attention performance people! Attention people who use numbers for performance! That’s you! You have one job! One job only! The purpose of your job, listen up, here it is, I’m about to tell you….it is to find out… “Is the … Continue reading

Posted in statistics, systems thinking, very short posts | Tagged , | 2 Comments

The Curious Case Of The Chart That Didn’t Bark In The Night

“Why has this performance indicator gone down three months in a row?” Regular readers of this blog will know the answer to this question already, without any knowledge of the indicator in question, or the work being measured. “It’s probably … Continue reading

Posted in data, statistics, systems thinking | Tagged , , , , | 4 Comments

How to be hopelessly untrendy

I got me some data! Done gone put it in a graph! Added meself a TRENDLINE! And me answer is THE TREND IS DOWNWARDS! This is what happens when people get data and have excel. They stick it in and press … Continue reading

Posted in command and control, data, statistics, systems thinking | Tagged , , , , | 3 Comments

How to be fooled by randomness

This is a roulette wheel. It is a machine for producing numbers between 0 and 36. Sometimes it produces a 7… Then sometimes it produces a 13… If a 7 is produced on one spin and a 13 on the … Continue reading

Posted in data, leadership, systems thinking | Tagged , , , | 1 Comment

I don’t know much about control charts (but I know what I like)

I’ve never been trained in using control charts, never passed a test or worked with anyone who’s knowledgeable in them. Everything I’ve learned has been off of the Internet Or books, books as well, they’re famously good for¬†learning. Cunninghams Law … Continue reading

Posted in data, deming, information, learning, measures, statistics, systems thinking | Tagged , , , , | 1 Comment

Only bullies, cowards or fools set targets

This is the story of a teacher in a UK school who was set a target of 75% exam pass rate. This summer the pass rate was 65%. If we ignore all the things we know about measures and targets … Continue reading

Posted in systems thinking, targets | Tagged , , , | 12 Comments