Fig. 3. Sensitivity analysis of the statistical process control methodology conducted by modeling successively smaller differences between the Operating Room of the Future (ORF) and standard operating rooms. The  top tracing is the statistical process control chart of the actual ORF impact relative to historical performance of ORF teams working in standard operating rooms. In the succeeding traces, 5, 10, 15, and finally 20 min have been added to each data point after ORF inauguration. LCL = lower control limit; UCL = upper control limit.