To inspect interaction of parameter values (C3), users can explicitly see the difference between groups of experiments (e.g., experiments with high yield vs. experiments with low yield) using the group comparison view. This view shows the summary visualization for each of the groups that are compared, and additionally, a visualization that explicitly shows the difference between two groups. For example, in Figure , when comparing the group of high-yielding experiments with the group of low-yielding experiments, the base and sulfonyl fluoride compounds and base equivalents differ most between the two groups. The group comparison helps users to see the feature values that differ most between two groups, making it easy to find well-performing parameter combinations identify critical factors (T3).