In supply chain management there are a couple of options that can be used (and from project man. experience too, and just from the top of my head. It's been a while since I've done this kind of planning)
- artificially slow the rate of 1st dose to a consistently manageable level.
- halt 1st dose when 2nd dose need arises
- enhance capacity
- spread out the 2nd dose to between 9-12 weeks.
- is the best option, obviously
All others have massive issues.
- best option, because it provides a very steady pace that can be kept up indefinitely. Con: not really pr friendly/not good propaganda; will drive deaths down a bit slower
- this is the most problematic overall, because that means that you do a group, then start again with them, meaning that group 2 will have to wait 2x months to get even their first jabs. And the potential risk of having to redo* some/all of group1 increases the risks of group 2 2nd dose and group 3 will maybe have to wait almost forever.
*eg: vacc only good for 6-7 months
- a planners nightmare :) but doable with a solid algorithm. Given this govs track record so far I would not like to bet my life on this. ...
If I had to do an assessment from looking in through the window as a total outsider I'd say that the UK went for option 2 and has it's fingers crossed that capacity can be grown.
Given how we don't know if vacc supply and vaccinator capacity are at what levels, there is no way to know what growing capacity will result in.
A) great, we have enough docs/nurses and places and supply chains are set up to handle x times more throughput
B) extra vaccs will be sitting in warehouses because the throughput at either the actual transport chain or at the centers will be limited and are now at full capacity.
C) something extraordinary happens and the pile of cards fall down - eg more than 10-30% of vaccinating staff get ill, go on strike, whatever.
It's an interesting thought problem and I'm sure that in the min. of defense there are a lot of algorithms for these sort of things, just with munition and such. Hope they are making good use of them to do models.