This is a classic – classic quality tale about inspection. I had parts with green stickers that were good and parts with 2 green stickers that were bad. The supplier said 2 green stickers meant that they’d been tested twice! Better!

What I found out was that the first green sticker was awarded if it sort of passed the final test and to make sure, they sent it through again! It became an easy way to identify intermittent failures.

This is a great summarization of the WW2 Bomber parable. Two Lessons:

1. Survivorship Bias and

2. GREAT demonstration of plotting data on a physical representation of your part or assembly line or your vehicle or your human body.