Survey and Analysis on the Dependence of Activity Durations in Project Scheduling Networks
Durations of individual operations or activities are assumed to be independently distributed in traditional approaches of project scheduling. However, in real situations, activity durations may not be independent but rather dependent when influenced by common factors or organized by manager. The objective of this paper is to analyze the statistical dependence of activity durations based on the survey data from some real projects and questionnaires from experts. Investigations are made on three project groups; the first includes ten projects finished by a client in recent years; the second contains ten projects finished by one contractor in recent two years; the third comprises ten projects of Gansu province. Several dependence measures are proposed, statistical analysis on the dependence of activity durations is made. According to the result, there exist strong dependence between the durations of parallel activities as well as the durations of serial activities, the dependence between activities influenced by common factors and the dependence between critical activities are universally existing. The dependence between activities is categorized from different aspects and its cause is analyzed.
Construction Project Management Project Schedule Dependence Random Variable
Mo Junwen Gao Mingxia Yin Yilin
School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou P.R.China, 730070;School of Manage School of Management, Tianjin University, Tianjin P.R.China, 300072 School of Management, Tianjin University of Technology, Tianjin P.R.China, 300191
国际会议
天津
英文
2007-10-20（万方平台首次上网日期，不代表论文的发表时间）