A Nonlinear Integer Programming Model for Integrated Location, Inventory, and Routing Decisions in a Closed-Loop Supply Chain

Table 1

Gaskell67-21 × 5 (retailer).

Retailer	Coordinates	Demand
i1	(151,264)	55
i2	(159,261)	35
i3	(130,254)	40
i4	(128,252)	70
i5	(163,247)	105
i6	(146,246)	20
i7	(161,242)	40
i8	(142,239)	5
i9	(163,236)	25
i10	(148,232)	30
i11	(128,231)	60
i12	(156,217)	65
i13	(129,214)	65
i14	(146,208)	15
i15	(164,208)	45
i16	(141,206)	105
i17	(147,193)	50
i18	(164,193)	45
i19	(129,189)	125
i20	(155,185)	90
i21	(139,182)	35

Remark: in this table, the daily demands are adapted by dividing the original quantities by 20 due to the vehicle capacity parameter used in this study.