Your Quarterly Reliability Report Is Lying To You
In the winter of , a lighthouse keeper named Jean-Pierre stood on a jagged tooth of rock off the coast of Brittany, staring at a lamp that had functioned perfectly for . He was a man who lived by the clock and the wick, a servant of the mechanical average.
According to the maritime records of the time, his lighthouse maintained a functional uptime that would make a modern data center blush. But on the three hundred and sixty-fifth night, a fog rolled in that was so thick it seemed to have physical weight-a “Great White Wall” that swallowed the sound of the waves and the very air in Jean-Pierre’s lungs.
That was the night the gear assembly in the rotating lens chose to shear its primary pin. To the regional shipping authority, Jean-Pierre was a hero of efficiency, boasting a 99.7 percent reliability rating. To the crew of the merchant vessel L’Espérance, which found the rocks forty minutes later, that 0.3 percent was the only statistic that ever existed.
The Anatomy of a “Successful” Failure
We love statistics because they provide a sense of control over a chaotic universe, but they are fundamentally dishonest
