Before revision:  Both then and now, what are now referred to as standard serial models and standard parallel models not only play an important role in psychological science, they are often what non-mathematical psychologists are (sometimes in an unschooled fashion) referring to when they up architectural concepts. Interestingly, two strategic and critical properties, and therefore implicit predictions of the canonical serial and parallel models have witnessed little analysis. Thus , standard parallel models predict stochastically independent actual processing timesand therefore total completion times.
After revision:  Both then and now, what are now referred to as standard serial models and standard parallel modes refer to stochastic independence. Standard serial models are defined by stochastic independence and identical distributions of their processing times. Processing times in the serial models are identical to the intercompletion time statistics. Similarly , standard parallel models predict stochastically independent actual processing timesand therefore total completion times.