Scheduling Emergency Physicians Based on a Multiobjective Programming Approach: A Case Study of West China Hospital of Sichuan University

Table 2

Notation and description of variables.

Notation	Description
Binary variables
	1 if the doctor group is assigned to shift on day or 0 otherwise
	1 if the doctor group is assigned to work at least one shift on the weekend or 0 otherwise
Positive deviation variables
	1 if the doctor group is assigned to the day shifts on days , , and consecutively or 0 otherwise
	1 if the doctor group is assigned to the day shifts on days , , , and consecutively or 0 otherwise
	1 if the doctor group is assigned to the night shifts on days and consecutively or 0 otherwise
	1 if the doctor group is assigned to the night shifts on days , , and consecutively or 0 otherwise
	1 if the doctor group is assigned to the strengthen shifts on days , , and consecutively or 0 otherwise
	1 if the doctor group is assigned to the strengthen shifts on days , , , and consecutively or 0 otherwise
Negative deviation variables
	1 if the doctor group is not assigned to a complete weekend starting from Saturday within the planning period or 0 otherwise
Positive and negative deviation variables
,	B shifts can be assigned to every doctor group within the planning period