Determining a Loop Material Flow Pattern for Automatic Guided Vehicle   Systems on a Facility Layout
  In this paper, we present a heuristic procedure for designing a loop material flow pattern on a given facility layout with the aim of minimizing the total material handling distances. We present an approximation of the total material handling costs and greatly drop the required computational time by minimizing the approximation instead of the original objective function. 
Hossein Jahandideh, Ardavan Asef-Vaziri, Mohammad Modarres
cs.SY