Let us focus on these ideas in turn. To explore our initial hypothesis that there exists a subset of high performing MOFs that are relatively insensitive to the FF, we first define a taxonomy for describing CRAFTED MOFs by their ability to meet the CCS constraints for different FFs using four distinct consistency classes (Table ). A small subset of 28 MOFs meets the CO2 purity and recovery constraints on a consistent basis, regardless of the particular variation of the FF chosen. We denote these materials as being at the highest level of consistency: Consistency Level 1 (CL1). That is, the spread and skewness of the performance distributions for materials in these classes can be visualised using box-and-whisker plots which require a minimum of 5 measurements to construct.