The knowledge-base is a 45x80 matrix containing the main effects for eighty design conditions total (two different values of ten variables on each of four facades) on the mean illuminance specific to three seasons, three periods of day, and five zones. This data is specific to the location and climate for which the DoE models were simulated. For this study, the knowledge-base is specific to Boston, MA. To interpret the meaning of the main effects, one must consider both the magnitude and sign of each effect. Highly positive main effects indicate that the corresponding design condition will result in a higher mean illuminance on the relevant work plane relative to other design conditions, while highly negative values indicate that the corresponding design condition will result in a lower meanilluminance on the work plane relative to other design conditions. When comparing two main effects of the same sign, the design change with the higher magnitude is more likely to result in a higher mean illuminance if both are positive or a lower mean illuminance if both are negative.