Flexible Network Plan and Its Computer Simulation Algorithm

The arc length in traditional network plan is fixed.This kind of network model is unsuitable for construction process analysis.After discusson of the defects of rigid network plan,the concept of Flexible Network Plan (FNP) is adopted corresponding to the random in work procedure.Based on statistics,the probability models of main processes in civil engineering project are suggested and their key parameters are determined.Then, the computer simulation algorithm for FNP analysis is put forward in the form of flow chart.The random generators create one value for each arc in one turn of simulation.The generators are coinciding with the probability model for the same work procedure. For one turn of simulation,the rigid network plan algorithm is used.After enough turns of simulation,the distribution of the total work period can be determined,at the same time the critical path can be found in the probability concept.