Thursday, 3:17 AM. Your phone rings in the middle of the night. The automated order system has stopped accepting transactions - customers are seeing errors, payments are not going through, and the night shift is helplessly standing in front of the terminals. Every minute of downtime means lost orders and erosion of customer trust. Worse, the system's creator, a freelancer who designed it two years ago, is unreachable - he's gone to Bali, and you don't even have access to the current documentation. Meanwhile, at first glance, everything looks normal - the servers are running, the monitoring isn't showing any alerts. The system that was generating 42% of your revenue just yesterday has suddenly refused to cooperate.