Moreover, in recent years, the manufacturing process analysed has exhibited significant efficiency degeneration for a number of reasons, such as work in progress growth, a loss of control of manufacturing activities and a high variance of cycle time. Taking advantage of a corporate reorganization opportunity, it was decided to redesign the production area layout. So, the first step was the identification of the best design method to adopt: would it be better to design the facility layout based only on the production crew’s experiences, or should it adopt a more skilled engineering approach, such as an analysis based on SLP?