2Chan D W M, Kumarawamy M M. Reason for delay in civil engineering project: The case of Hong Kong[J]. Transactions, 1996,2(3) : 1～8.
3Assaf S A, AI-Khalil M, AI-Hazmi M. Cause of delay in large building construction projects[J]. Journal of Management in Engineering, ASCE, 1995,11 (2): 45 ～ 50.
