Originally Posted by
KelvinD
The CEO has spoken. He says it is all down to a power supply failure.
I was surprised he had a degree in engineering. I had supposed his degree may haven been in kidology!
If he is not out the door by Tuesday, then Willie Walsh should be considering his own position.
I shall translate:
"He says it is all down to a power supply failure."
really means:
We designed the system so that one power supply failing would bring down our entire operations worldwide.
Therefore
- Primary reason is poor hardware system design
- Secondary reason: lack of or poor system acceptance testing
In this BA seems to be following the example of Delta whose backup system was powered through the same cutover switch as the primary system. So cutover switch became the single point of failure - and it did.
Rule one of fault tolerance:
Single points of failure ALWAYS fail.