""For years we had problems with the factory servers shutting down over long weekends," Cole told Who, Me? Nobody could figure out the reason for the outage, but it was generally agreed that external events that took place over long weekends - things like major roadworks or electricity companies working on the grid - caused the issues. IT staff therefore decided acquiring a bigger uninterruptible power supply (UPS) would improve resilience."
"Cole eventually figured out the problem: The switch that controlled power to the company's servers was the same switch that powered his workshop. As a sensible chap, Cole had been hitting that switch every night as he left work. The UPSes had enough juice to keep the company's servers running overnight during the week, and between Friday evening and Monday morning - but not enough for a long weekend."
The factory experienced recurring server shutdowns over long weekends initially attributed to external grid or roadworks events. IT purchased progressively larger UPS systems, which temporarily hid the problem but failed during extended breaks like Christmas. The true cause was a shared power switch that also supplied an employee's workshop. The employee routinely turned that switch off at the end of each day, allowing UPS batteries to bridge short weekends but not long ones. The company resolved the issue by clearly labeling switches with warnings and instructions, preventing accidental shutdowns without assigning blame.
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