Presenting a Fuzzy Multiobjective Mathematical Model of the Reverse Logistics Supply Chain Network in the Automotive Industry to Reduce Time and Energy

Table 3

Model parameters.

Symbols	Definitions
	The cost of transporting the product “u” from the suppliers to the centers of producers p
	The cost of transporting the product “u” from the centers of producers p to the warehouse p′
	The cost of transporting the product “u” from the warehouse p′ to the distributor d
	Cost of shipping the product “u” from distributors d to customer
	The cost of transporting the recycled product “u” from the customer to the used car collection center j
	The cost of transporting the recycled product “u” from the used car collection center j to the recycling center r
	The cost of transporting the recycled product “u” from the recycling center r to the disposal center n
	The cost of transporting the recycled product “u” from the recycling center r to the production center p
	The distance from the suppliers to the centers of producers p
	Distance from producer p to warehouse p′
	Distance from the warehouse p′ to distributors d
	Distance from distributors d to customer
	Distance from customer w to the used car collection center j
	Distance from used the car collection center j to recycling centers r
	Distance from the recycling center r to disposal center n
	The distance from the recycling center r to the production center p
	The cost of assembling the returned product from the recycling center r to production center p in period t
	The return rate of the product u from the recycling center r to destruction center at location n in period t
	The return rate of the product u from the recycling center r to suppliers s in period t
	The return rate of the product u from the recycling center r to distributor d
	The return rate of the product u from the recycling center r to manufacturers p
	The capacity of the disposal center in product disposal
	Distributors’ shipping capacity s
	Product production capacity u in the production center p
	The fixed cost of building a distribution center on site d
	The cost of building a collection and recovery center in the place j
	The cost of building a recycling center on site r
	The cost of building a burial and destruction center in the place of n
	The cost of keeping the product “u” per unit in the warehouse p′ in the period “t”
	Cost of holding the product “u” per unit at distributor “d” in the period “t”
	The cost of late delivery of the car from distributor d to the customer at time t
	The amount of demand for the product u by the customer
	The return rate of the product u from the customer