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What does "lights-out systems" mean in

While agile might not be suitable for building safety-critical and lights-out
systems, ...

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Lights-out management (LOM) is the ability for a system administrator to monitor and manage servers by remote control. A complete LOM system consists of a hardware component called the LOM module and a program that facilitates the continuous monitoring of variables such as microprocessor temperature and utilization. The program also allows for such remote operations as rebooting, shutdown, troubleshooting, alarm setting, fan-speed control, and operating system reinstallation.

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More generally lights-out is a facility/plant/installation with no onsite staff, ie totally automatic and so the system must be highly reliable – mgb Feb 26 '12 at 1:35

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