Table 4 Time requirements in the domain of building.

From: Minimum Number of Settlers for Survival on Another Planet

Activity in the building industryAnnual time requirement per individual with range for 95% CISharing factor as a function of n with range for 95% CI
Production of concrete or equivalent380 ± 110n0.7 ±0.2
Construction of new buildings940 ± 280n0.7 ±0.2
Equipping new buildings940 ± 280n0.5 ±0.15
Maintenance1880 ± 470n0.4 ±0.1
Other activities, including innovation1880 ± 940n0.5 ±0.2