We are working on a police substation that houses two precincts with three shifts per precinct. Each shift will have a sergeant at the station (for the whole shift +/-) and the rest are in patrol cars for 6.5 hours of their 8 hour shift. Shift start times vary per precinct so my max occupancy is two full shifts, for one precinct, during shift change. Are the patrolmen best  classified as transient users or part-time?