Why is time-to-occupancy considered a critical performance indicator for new emergency shelter concepts?

Sudden-onset disasters often leave victims with nothing, necessitating shelters that can be deployed rapidly in the first 72 hours.

Time-to-occupancy is widely regarded as the most important performance indicator in emergency housing because the immediate aftermath of a disaster is a race against time. In scenarios where populations are fleeing rapidly with few belongings, the ability to provide immediate cover is a matter of life and death. Shelters that require complex assembly, heavy tools, or large crews are effectively useless during the first 72 hours, which is the most vulnerable period for survivors. Innovation in this field is therefore heavily skewed toward designs that can be erected by one or two untrained individuals in under thirty minutes, prioritizing speed over other factors like aesthetic appeal.