Optimization of the Shunting Operation Plan at Electric Multiple Units Depots

Table 1

Notations used in the models.

Notations	Definition
Set
	The set of all EMUs, dummy EMUs not included
	The set of S-EMUs,
	The set of L-EMUs,
	The set of works, dummy works not included
	The set of tracks for Work-
Parameters
	The arrival time of EMU-
	The departure time of EMU- from the depot
	The standard operation time of EMU- for Work-
Decision variables
	The time of EMU- to enter any track for Work-
	The time of EMU- to depart any track for Work-
	The delay of EMU- departing the depot
	Binary variable,  = 1 if EMU- performs Work- before Work-,  = 0 otherwise
	Binary variable,  = 1 if EMU- occupies Track- before EMU-,  = 0 otherwise
	Binary variable,  = 1 if S-EMU- occupies Section I,  = 0 if occupies Section II