Abstract: The robotic workstation layout is the main part of the design for a flexible robotic assembly system.In this paper,by using of the Monte Carlo theory,the influences of all kinds of errors,robot pose errors compensation and robot compliance upon the robotic assembly process is studied.A discrirninant of process success of assembly is introduced and verified by experiment.Then the Monte Carlo optimization is used to determine the location of feeders and assembly point which is of highest success rate of assernbly process.The layout procedures presented is of great value to the design of flexible assembly system.