Variability in pig growth costs producers due to sort losses at marketing and reduced barn utilization. This experiment was designed to determine if pre-planned segregation (PPS), the separation of the total population of pigs into sub-groups expected to differ in performance, could improve barn utilization. A total of 2080 pigs, weaned over 8 weeks, were divided into groups based on weight at weaning. Segregation had no effect on variability of the entire group, or percentiles of the lightest or heaviest subsets of that group at d 50. Since it is expected that the rooms housing the heavier pigs would turn over more quickly, PPS could therefore be used to improve overall barn utilization.