Malcolm Gladwell：The strange tale of the Norden bombsight

- It is machine that spent US$ 1.5 billion in WW II to developed (as compared to 3 billion in Manhattan project)
- A device to drop bomb from the air with precision (in practice).
- Only works Cloudless sky, low speed, low attitude.
- 750 acre chemical plant, 85,000 bombs only 10% lands, with 16% didn't go off.
- Many gadgets that claims to be Norden bombs, but it actually means very little: it solves the wrong problem.
- Droid killing in war was 95% effective, but suicide bombing increase 1000%.

Takeaway: 
Be flexible, change your way of attacking a problem. Be careful of metrics and KPI.