...Lazhar Tlili; Chelbi Anis; Mokhles Bouazizi Purpose This paper deals with a particular type of leasing contracts according to which an equipment is leased for free with the condition for the lessee to purchase a predetermined minimum quantity of consumables during each leasing period. Maintenance...

.../approach The problem is a four‐parameter optimization with two parameters being k‐dimensional. The optimal solution is obtained by using a four‐stage approach where at each stage a one‐parameter optimization is solved. Findings Upgrading action is an extra option before the lease of used...