Table 2 Overview of theoretical models and their results (light grey ░: real reference models [real model 2009 as well as possible real operational results at full capacity utilisation]; dark grey ▓: less profitable and loss-making models compared to real cost models; middle grey ▒: more profitable models compared to real cost models).

Model	Brief description of model	Bed occupancy (%)	Surgical minutes	Operating profits or losses (€)
DRG = Diagnosis Related Groups; P-DRG = paediatric DRG
2009	Bed occupancy rate the same as in 2009, same mix of cases, no P-DRG subventions	79.70 %	73 090	145 787.38░░
2009 100 %	2009 model with 100 % bed occupancy rate	100.00 %	91 700	1 124 999.15░░
A	No births, no P-DRGs	100.00 %	80 611	− 1 739 546.56▓▓
B	All pregnancies or children who are only slightly pathological or not pathological at all are turned away	100.00 %	142 465	− 769 041.28▓▓
C	Only less profitable DRGs carried out	100.00 %	34 364	− 638 621.25▓▓
D	Surgical capacity (176 880 minutes) distributed across all surgical DRGs; distribution of DRGs according to the share of the respective DRG in the surgical minutes recorded for 2009; no other DRGs; number of beds could be reduced by 6	84.42 %	176 880	− 503 067.48▓▓
E	Equal distribution of all bed capacities used in 2 009 for deliveries across the 6 different O01 DRGs (c-sections); bed occupancy rates for remaining DRGs remain the same	100.00 %	135 656	− 75 948.71▓▓
F	No P-DRGs	100.00 %	91 700	− 36 074.87▓▓
G	Only prenatal DRGs O64A/B and O65A/B and caesarean sections; the same proportion of P-DRGs as in 2009	100.00 %	144 122	319 984.76▓▓
H	Surgical capacity (176 880 minutes) shared out completely and evenly (16.67 %) across the 6 different c-section DRGs; no other DRGs; 20 additional beds required which increases fixed costs	155.90 %	176 880	555 085.64▓▓
I	Only non-surgical DRGs	100.00 %	0	1 170 873.41▒▒
J	Cf. models E and N; instead of the O01/O02 DRGs, this model includes O60 DRGs (vaginal deliveries)	100.00 %	13 092	1 204 986.82▒▒
K	Cf. model G; instead of the caesarean sections, this model includes O60 DRGs (vaginal deliveries)	100.00 %	0	1 214 574.84▒▒
L	All pregnancies and children with pathologies turned away	100.00 %	72 956	1 415 465.45▒▒
M	Share of bed occupancy rates of profitable DRGs are doubled, share of less profitable DRGs are halved; adjustment of calculated proportion of 100 % bed occupancy rate; same proportion of P-DRGs as in 2009	100.00 %	96 038	1 742 922.43▒▒
N	Cf. models E and J; instead of O01 and O60 DRGs, this model includes O02 DRGs (vaginal deliveries with complicating OR procedure)	100.00 %	162 377	3 133 122.76▒▒
O	Proportion per DRG of the capacity constraint “inpatient days” redistributed across other DRGs as profitably as possible	100.00 %	194 296	3 221 534.33▒▒
P	cf. model C, instead of the less profitable and loss-making DRGs this model includes only the most profitable DRGs	100.00 %	92 918	5 108 788.48▒▒
Q	24 OR hours in the delivery room per day (525 600 surgical minutes per year); only caesarean sections and P-DRGs; total of 63 additional beds required	275.01 %	525 600	9 532 718.69▒▒