Today's award goes to the contractor allegedly responsible for completely disrupting British Airways' flights for several days last week.
The crisis was caused by power being suddenly lost to BA's two main data centres, with the problem worsened by an uncontrolled reboot of the system which shut down the entire IT system. All information about flights, baggage and passengers was lost and travellers were left stranded over the bank holiday weekend with at least 700 flights cancelled at Heathrow and Gatwick.
Bill Francis, Head of Group IT at BA's owner International Airlines Group (IAG), sent an email to staff, seen by the Press Association, which confirmed that the shut down had not been caused by IT failure or software issues.
His email revealed that an investigation so far had found that an Uninterruptible Power Supply to a core data centre at Heathrow was over-ridden on Saturday morning.
He said: "This resulted in the total immediate loss of power to the facility, bypassing the backup generators and batteries. This in turn meant that the controlled contingency migration to other facilities could not be applied.
"After a few minutes of this shutdown of power, it was turned back on in an unplanned and uncontrolled fashion, which created physical damage to the system, and significantly exacerbated the problem."
There's more at the link.
I daresay the maintenance worker who flicked the wrong switch (and/or the company that employed him) won't be able to afford to pay the several hundred million pounds that the disruption is going to cost BA, after all compensation claims are paid and its aircraft and crews are finally back at work. That's a hellish expensive mistake!