Modelling a Nurse Shift Schedule with Multiple Preference Ranks for Shifts and Days-Off

Table 1

Shift preference weights of the nursing staff.

Staff	The assigned shift number in the past			Preference weight
	Good	Normal	Bad
1	2	0	0	4
2	2	0	0	4
3	2	0	0	4
4	2	0	0	4
5	1	0	1	16
6	1	0	1	16
7	2	0	0	4
8	2	0	0	4
9	2	0	0	4
10	2	0	0	4
11	2	0	0	4
12	1	1	0	8
13	2	0	0	4
14	2	0	0	4
15	2	0	0	4
16	1	1	0	8
17	1	0	1	16
18	1	0	1	16
19	1	0	1	16
20	2	0	0	4