“…There are many experiences in the improvement of hospital processes. The process approach to hospital management is increasingly applied, a philosophy that shows a holistic approach and pursues hospital excellence with a strategic vision [5], the process representation as a synthesized way to see relationship between activities [6], analysis of patient waiting times [7], level of service provided [8], the planning process [9], such as the uses of case mix measurement systems [10,11] and, within them, the Major Diagnostic Categories (MDC) as a more universal, mutually exclusive patient grouping system, according to affected organs or systems, based on the main diagnosis of the episode [12], the MDC can be disaggregated in more specific ways into the Diagnosis Related Groups (DRGs) as a system for grouping patients into clinically coherent classes with equal resource consumption [13][14][15], are of vital importance for increasing hospital efficiency [16].…”