Installation is staggered by one month between sequential units to enable more efficient utilization of manpower and project management than if multiple units were connected at one time.
Installation is staggered in order to make the manpower more efficient. 
mnli hypothesis: Installation is staggered in order to make the manpower more efficient.  premise: Installation is staggered by one month between sequential units to enable more efficient utilization of manpower and project management than if multiple units were connected at one time.