quantified using data envelopment analysis [3]. The caseload of each specialty at each hospital is a valid [4] and useful [5] end-point to determine if more workload for each specialty can be achieved at each hospital based on hospital and census data [6]. Results comparing scores of hospitals can be summarised in tabular and graphical format for managers [6,7] and integrated into OR block time decisions [6,8].We challenge Pandit et al. to show corresponding validity [4,6] and usefulness [5,7,8] of their measure of technical efficiency, their assumption of including homogeneity among specialties. They should also document that inclusion of cancellation rate does not result in poor statistical properties [9] and low reliability due to different hospital's definitions of cancellation.