Integrated Production and Distribution Planning for the Iron Ore Concentrate

Table 1

Parameter settings and symbol definitions used in numerical analysis.

Parameter	symbol definitions
	The optimal solution obtained by CPLEX software
UB^1	The upper bound obtained by the Lagrangian approach based on the first relaxation strategy
UB^2	The upper bound obtained by the Lagrangian approach based on the second relaxation strategy
	The maximum computing time by CPLEX software (in seconds)
	The average computing time by CPLEX software
MT^1	The maximum computing time of the Lagrangian approach based on the first relaxation strategy
AT^1	The average computing time of the Lagrangian approach based on the first relaxation strategy
MT^2	The maximum computing time of the Lagrangian approach based on the second relaxation strategy
AT^2	The average computing time of the Lagrangian approach based on the second relaxation strategy
GAP^1	(UB^1-)/ ×100%
GAP^2	(UB^2-)/ ×100%