Through its "error" metric, Kinalite can also produce a rudimentary overlay score (Fig. ), which produces almost the same order assignment as Auto-VTNA for the simulated kinetic data in Figure . However, its reduced reliability becomes evident from the erratic curve produced, particularly at negative order values. When utilising Auto-VTNA to solve the reaction orders of two reacting species, the correlation between the overlay score and the combinations of order values can be visualised by a contour plot (Fig. , central plot). If the algorithm is set to obtain the reaction orders of three or more reaction species, overlay scores can be tabulated for a selected number of order value combinations. However, in this case, the results are challenging to visualise due to the higher dimensionality of the data. Alternatively, if a reaction order in a species is already known, this can be inputted as a fixed value, if desired. The algorithm then calculates the overlay score as a function of the remaining species. This lowers the dimensionality of the results obtained so that they can be visualised by a graph or contour plot. VTNA overlay plots generated using kinetic data on the Aza-Michael reaction between methyl itaconate (1) and piperidine (2). The overlay plots are generated by right-clicking on the contour plot.