Before revision:  What do standard serial models predict about this statistic? Similarly, standard serial models predict independent actual processing times and therefore intercompletion times . What do standard parallel models predict about this statistic?
After revision:  What do standard serial models can predict for the total completion time or what standard parallel models can predict for the intercompletion times. Here we demonstrate that standard serial models possess a tendency to predict a positive dependence for the total completion times with that always being true in the case of a single processing order. However, with mixtures of processing orders, standard serial models may predict negative dependence of the total completion times. Comparably, standard parallel models typically predict neither independence of the intercompletion times nor identical distributions. In fact, standard parallel models predict about this statistic?