This paper presents a method to evaluate a repair time of building damaged by an earthquake. The repair time is evaluated by a repair schedule described by logic network. The logic network of the repair schedule is automatically generated based on preceding activities of each activity. The shortest repair time is evaluated under resource limitations of worker types. The proposed method is so automated that it can be incorporate into the evaluation procedure proposed in FEMA P-58 which employs Monte Carlo simulation to consider variability of earthquake response evaluation and damage evaluation, etc.