Abstract: In order to solve the problems of complex engineering projects schedule risk assessmentdue to their complex structure,long cycle and numerous risk factors,a project schedule risk assessment model based on the multi agent was established by the Anylogic software.In this model,a “process” agent,a “process flow” agent,a “risk factor” agent and a“control” agentwere were designed by taking into account the process state,transformation conditions and the internal processing behavior of the state.Multiple nested relations between the “process flow” and the “process” were formed by “risk factors”.The risk factors sensitivity analysis of a certain type of marine diesel engine maintenance project was completed through simulation experiments,then it come up with the risk factors in important processes that should be taken measures to give priority to control.Experiment results show that the model for complex engineering project schedule risk assessment has a certain reference value.

Key words: Engineering project, Multi agent, Risk assessment, Schedule risk