I've been working 4 day workweeks for well over a decade now, took the pay cut myself. As for the goal to maintain 100% productivity whilst cutting back on hours, I'm confident that they will succeed. In fact, they'll succeed in this without requiring some kind of brilliant plan, as this recalibration happens automatically. When you start working one day less, nobody will reduce your workload by 20%. You'll have the…
I'd argue that the majority of office settings don't have moments of slack, but rather moments of productivity. This same productivity can be achieved in wayy less time than the standard 40 hours/week.
I'd say it's incredibly common for a modern office worker to be engaged in email, meetings and chat for some 4-6 hours per day.
Not only does this leave little time to do actual tasks, that little time is also highly fragmented across the day.
It's a point I've made repeatedly on similar threads: the problem with modern office work is too much collaboration. Pretty much we spent the vast majority of the day figuring out what to do when, instead of actually doing it.