A geometrical model for managing surface productivity of U-shaped assembly lines

Abstract

Portal del coneixement obert de la UPC http://upcommons.upc.edu/e-prints Aquesta és una còpia de la versió author's final draft d'un article publicat a la revista CIRP annals. Manufacturing Technology.

An in-plant milk-run design method for improving surface occupation and optimizing mizusumashi work time

“…A review and categorization of in-plant milk runs reported that material handling occupies 55% of a factory's surface [14]. Recent research on milk-run design, such as the Vehicle Routing Problem (VRP), has focused mainly on minimizing the total distance travelled or minimizing the number of vehicles applied [15,16] but less attention has been paid to milk-run design for surface reduction and handling productivity [17].…”

“…Reduce P as much as possible. This is particularly relevant because, accordingly to [17], production cells surface has a quadratic relationship with P. Nevertheless, P reduction has some limits: the shorter the P, the more trips from storage to POUs are needed, so more driving time is added to mizusumashi workload.…”

“…3. Shortening the replenishment period (P) to reduce the production line surface due to containers at its POUs [17].…”