Advertisements

Not Everything That Counts Can Be Counted And Not Everything That Can Be Counted Counts


wealthymatters

During World War II, lots of fighter planes were getting hit by anti-aircraft guns. Air Force officers wanted to add some protective armor/shield to the planes. The question was where? The planes could only support few more kilos of weight.

A group of mathematicians & engineers were called for a short consulting project. Fighter planes returning from missions were analyzed for bullet holes per square foot. They found 1.93 bullet holes/sq. foot near the tail of the planes whereas only 1.11 bullet holes/sq. foot close to the engine.

The Air Force officers thought that since the tail portion had the greatest density of bullets, that would be the logical location for putting an anti-bullet shield. A mathematician named Abraham Wald said exactly the opposite; more protection is needed where the bullet holes aren’t – around the engines.

His judgment surprised everyone. He said “We are counting the planes that returned from a mission. Planes with lots of bullet holes in the engine did not return at all”.

Advertisements

About Keerthika Singaravel
Engineer,Investor,Businessperson

Please Leave Me Your Comments!I Love Reading Them!

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: