Tag Alignment is the Name of the Game

Across the whole file, the source reads as a single continuous argument. It opens with: "Power Usage Effectiveness (PUE) is defined by ISO/IEC 30134-2 as the ratio of total facility energy to IT-equipment energy, both measured at the same reporting boundary over the same period." Its centre of gravity: "Regional variation is driven by climate: cool-climate facilities in the Nordics achieve PUE below 1.10 with free-air cooling, while tropical sites often exceed 1.6.". The through-line closes on: "Uptime notes that reported PUE has stagnated across the industry median while installed capacity and IT power density have grown, suggesting that gains from equipment efficiency are being offset by higher-density workloads and by legacy facilities that dominate the population."

At the wide scope, grouped sections trace a broad thematic arc. It opens with: "Overview Power Usage Effectiveness (PUE) is defined by ISO/IEC 30134-2 as the ratio of total facility energy to IT-equipment energy, both measured at the same reporting boundary over the same period." Its centre of gravity: "Regional variation is driven by climate: cool-climate facilities in the Nordics achieve PUE below 1.10 with free-air cooling, while tropical sites often exceed 1.6.". The wide arc closes on: "Uptime notes that reported PUE has stagnated across the industry median while installed capacity and IT power density have grown, suggesting that gains from equipment efficiency are being offset by higher-density workloads and by legacy facilities that dominate the population."

At the medium scope, one section speaks in its own voice. It opens with: "Overview Power Usage Effectiveness (PUE) is defined by ISO/IEC 30134-2 as the ratio of total facility energy to IT-equipment energy, both measured at the same reporting boundary over the same period." Its centre of gravity: "Regional variation is driven by climate: cool-climate facilities in the Nordics achieve PUE below 1.10 with free-air cooling, while tropical sites often exceed 1.6.". The section point closes on: "Uptime notes that reported PUE has stagnated across the industry median while installed capacity and IT power density have grown, suggesting that gains from equipment efficiency are being offset by higher-density workloads and by legacy facilities that dominate the population."

At the narrow scope, a single passage crystallises the claim. It opens with: "Overview Power Usage Effectiveness (PUE) is defined by ISO/IEC 30134-2 as the ratio of total facility energy to IT-equipment energy, both measured at the same reporting boundary over the same period." Its centre of gravity: "A PUE of 1.0 represents a theoretical ideal in which all electricity delivered to the facility is consumed by IT load; every 0.1 above 1.0 represents 10 % overhead for cooling, power distribution losses, lighting and ancillary systems.". The close reading closes on: "A PUE of 1.0 represents a theoretical ideal in which all electricity delivered to the facility is consumed by IT load; every 0.1 above 1.0 represents 10 % overhead for cooling, power distribution losses, lighting and ancillary systems."