Certainty in a set of order values can also be assessed through automatic calculation of the range in which the overlay score for a set of order values is no greater than 15% (by default) from the optimal overlay score. For example, the assigned order of 0.94 shown in Figure has a 15% overlay score interval of (0.912, 0.987) whereas the corresponding interval for Figure is (0.937, 1.084) in 1 and (0.973, 1.059) in 2. Noisier kinetic data will give wider intervals, whereas kinetic datasets with good variation in initial concentrations and high signal-to-noise ratio will give narrower intervals, indicating greater certainty in the calculated order values (see ESI, Section S6.2). The range of order value combinations within this cut-off can be represented by an orange line if the order in only one species is calculated (Fig. ) or visualised as blue dots in a contour plot (Fig. ).