Understanding the fundamentals of Kanban and CONWIP pull systems using simulation

This paper presents an introductory overview and tutorial in simulation modeling and control of serial Kanban and CONWIP (Constant Work In Process) pull systems using ARENA/SIMAN 3.5/4.0. Card level estimation is discussed for both types of pull systems, and a heuristic method to adjust card levels controlling system WIP (work in process) is provided. The objective is to present a tutorial for students and practicing engineers familiar with the basics of simulation, but unfamiliar with pull system fundamentals.