Success rate in terms of number of cells filled with high-quality z_spec. The observed targets are divided into high (P1) and low (P2) priority targets according to the prioritisation scheme described in Sect. 3.2. Purple horizontal bars represent the total number of undersampled cells requiring z_spec measurements; orange histograms represent the number of cells targeted by all KMOS observations, and green histograms represent the number of cells that provided accurate z_spec measurements.