The INRC2010 benchmark has been proposed for a competition held in 2010, the International Nurse Rostering Competition [Haspeslagh et al. 2012]. This benchmark has been selected for our study because 1) the model contains a reasonable set of realistic constraints, 2) results are available in the literature, and 3) the dataset is composed of various instances of different size and characteristics. More information on shift scheduling and the INRC model can be found in the section Interactive optimization > Shift scheduling.

The data files of the INRC2010 benchmark are available on the competition website. An archive with all instances (in XML format) is also available here.

The following table summarizes the characteristics of each instance. For the Soft constraints columns, a point indicates that a soft constraint of the corresponding type is active for at least one contract with a non-null weight.

Problem ID Days Employees Assignments Soft constraints (See tooltips on column names for description)
S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14(a) S14(b)
sprint01 28 10 152
sprint02 28 10 152
sprint03 28 10 152
sprint04 28 10 152
sprint05 28 10 152
sprint06 28 10 152
sprint07 28 10 152
sprint08 28 10 152
sprint09 28 10 152
sprint10 28 10 152
sprint_hidden01 28 10 140
sprint_hidden02 28 10 136
sprint_hidden03 28 10 152
sprint_hidden04 28 10 168
sprint_hidden05 28 10 168
sprint_hidden06 28 10 140
sprint_hidden07 28 10 136
sprint_hidden08 28 10 152
sprint_hidden09 28 10 168
sprint_hidden10 28 10 168
sprint_hint01 28 10 152
sprint_hint02 28 10 152
sprint_hint03 28 10 152
sprint_late01 28 10 152
sprint_late02 28 10 144
sprint_late03 28 10 160
sprint_late04 28 10 160
sprint_late05 28 10 152
sprint_late06 28 10 152
sprint_late07 28 10 152
sprint_late08 28 10 152
sprint_late09 28 10 152
sprint_late10 28 10 152
medium01 28 31 608
medium02 28 31 608
medium03 28 31 608
medium04 28 31 608
medium05 28 31 608
medium_hidden01 28 30 448
medium_hidden02 28 30 488
medium_hidden03 28 30 448
medium_hidden04 28 30 488
medium_hidden05 28 30 440
medium_hint01 28 30 428
medium_hint02 28 30 428
medium_hint03 28 30 428
medium_late01 28 30 424
medium_late02 28 30 428
medium_late03 28 30 428
medium_late04 28 30 416
medium_late05 28 30 452
long01 28 49 740
long02 28 49 740
long03 28 49 740
long04 28 49 740
long05 28 49 740
long_hidden01 28 50 752
long_hidden02 28 50 752
long_hidden03 28 50 632
long_hidden04 28 50 688
long_hidden05 28 50 632
long_hint01 28 50 740
long_hint02 28 50 740
long_hint03 28 50 740
long_late01 28 50 752
long_late02 28 50 752
long_late03 28 50 752
long_late04 28 50 752
long_late05 28 50 740