To ensure construction of prefabricated buildings completed on time and achieve effective control of construction schedule, the study is to investigate the factors influencing the schedule from employees engaged in the design, construction, and management of fabricated buildings. In the study, the frequency, impact level, and improved cost of influencing factors are analyzed and evaluated based on principal components analysis (PCA). From the analysis and evaluation, the factors needed to be controlled and improved can be firmed. The results showed that lack of coordination of crane between professional subcontractor, improper handover process, and unclear division occurred frequently, and their impacts on schedule are great, however, the costs for improving these factors are low. It's easy to speed up schedule by strengthening the control of these factors. Lack of experience in on-site construction workers also has great impact on schedule, but the cost is too high, it can gradually be improved by investing in human and material later.
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