Table 1.

Hierarchical level.

Hierarchical level	Focus	References
Capacity planning	Blueprint schedule	Bikker et al. (2015), Dharmadhikari and Zhang (2011), Lebcir et al. (2017), Leeftink et al. (2016a), Leeftink et al. (2017), Liang et al. (2015), Mutlu et al. (2015), Oh et al. (2014), Oh et al. (2013), Proctor et al. (2007), Qu et al. (2013), Vrugt et al. (2017), Zonderland et al. (2015)
	Patient admission planning	Barz and Rajaram (2015), Conforti et al. (2011), Hulshof et al. (2013), Hulshof et al. (2016), Kortbeek et al. (2017), Romero et al. (2013)
	Temporary capacity changes	Hulshof et al. (2013)
Capacity-to-patient assignment	Offline scheduling	Azadeh et al. (2014), Castro and Petrovic (2012), Cheng et al. (2008), Chern et al. (2008), Chien, Tseng et al. (2008), Chien, Huang et al. (2008), Conforti et al. (2011), Cordier and Riane (2013), Du et al. (2013), Froehle and Magazine (2013), Gartner and Kolisch (2014), Hu et al. (2009), Jerić and Figueira (2012), Leeftink et al. (2016a), Lin (2015), Matta (2009), Matta and Elmaghraby (2010), Pérez et al. (2013), Petrovic et al. (2013), Podgorelec and Kokol (1997), Raschendorfer and Hamacher (2014), Rossi et al. (2013), Saadani et al. (2014), Sadki et al. (2011), Saremi et al. (2015), Schimmelpfeng et al. (2012), Shin et al. (2010), Kortbeek et al. (2017), Vlah et al. (2011), Zhao et al. (2015)
	Online scheduling	Aslani and Zhang (2014), Azadeh et al. (2015), Barz and Rajaram (2015), Braaksma et al. (2014), Cardoen and Demeulemeester (2008), Day et al. (2010), Dharmadhikari and Zhang (2011), Hahn-Goldberg et al. (2014), Kalton et al. (1997), Kapamara et al. (2007), Liang et al. (2015), Matta and Patterson (2007), Oh et al. (2013),Oh et al. (2014), Paulussen et al. (2003), Pérez et al. (2011), Pérez et al. (2013), Vermeulen et al. (2007), Vermeulen et al. (2008), Werker et al. (2009)