Yes, I made the assumption that the Alpha revisions were at different lifecycle states than the numeric revisions. If there is only one revision series that continues right from numeric into alpha (like you show above) for all lifecycle states, then policy administration will not do what he's requesting.
Of course I would then question if this is a good approach. How would you know how many numeric steps to put in the series? What if you don't need all the numeric steps? (You'd have to manually force everything to go to the first alpha revision at release? (Which is possible, just not automatic.) Seems like it'd be much simpler to use a two-phase development process with numeric series for the prototype states and alpha for the production phases.