Thanks for explaining that, Britsimon. I didn't realise that the number of selectees wasn't also the number of case numbers. I now understand why there may be more or less than 4215 case numbers.
Thanks too for posting the link to those December stats for Oceania. It seems that about only one in three case numbers makes it to the processing stage (the rest are presumably number "holes", or winning numbers whose owners didn't send in their forms). So if, for argument's sake, we generously assume that visas are issued to every single winner who makes it to the processing stage (and ignore the number of winners who are denied visas at interview time etc), could it be argued that if 730 visas are issued in 2014 (the same number as were issued in 2013), and if we were to times 730 by three, we'd get a rough idea of how many selectees will get an interview? That figure would be 2190, a figure similar to the actual number of selectees for 2013 (2193). By my reasoning, even if Oceania's regional quota hasn't increased for 2014, despite there being almost double the number of selectees, people with case numbers up to about 2200 should be fairly confident they'll get an interview. Britsimon, I know much less about this than you and your friends who write in the statistics thread, but do you think there's any merit in my reasoning? Also, am I right in assuming that 730 is the number of primary winners and doesn't include derivatives?
Tony, I am not as bright as some of the stats people so I've read your theory 2 or 3 times and my head is spinning a bit. Let's see if we can clear this up...
Firstly, the 730 visas issued in 2013 would include derivatives.
In the CEAC data for 2014 (as published previously) we see case numbers going up to CN636 (the cutoff being 650) and that is from 200 rows accounting for 360 people. The 200 is the primary applicants and the 360 is those plus derivatives - 1.8 visas per case (a bit lower than my 1:1 suggestion earlier).
OK so you have taken the return rate as 200/636. As you say, the 436 includes holes (disqualifications) and people that have not submitted their forms
yet. Some of that latter group may submit later. Also in the 436 are some cases that have been submitted but didn't make it in to CEAC (I think Mijoro found some added with a manual check) AND adjustment of status (aos) cases. Normally aos is quite low (less than 5% overall, but I would guess a bit higher for OC since Australia has an additional visa program - E3. So - it would not surprise me to find the total response rate is 20/30 cases higher than the 200, perhaps more. But still, between people that don't bother and holes, there are lots of gaps...
Now back to your point. We know 730 visas came from around 2193 selectees in 2013. However, you are also trying to figure out the visa per case number ratio - but I'm a bit lost with what you tried to do. There is a 3:1 ration of cases at processing stage to total case numbers BUT that covers more people than you are allowing for because we are talking case numbers versus cases with derivatives. So when you make the leap to case numbers up to 2200 being ok that is a bit problematic to justify in the maths ALTHOUGH I think the end result is about right.
There are some other ways to say what you are trying to get at. Let's try and construct some safe deductions and see of some of those give you some comfort.
The highest OC case number in 2013 CEAC data was 1638. We know that data is missing some cases, but it is pretty good. So the 2193 were spread among 1700 cases numbers. The 2013 data shows 493 cases affecting 862 people. So - roughly the same derivative rate of 1.8 people per case and roughly one third of the cases returned. Since we know there we originally 2193 selectees that should have been about 1200 primary applicants. That means at least 500 cases were holes. So we can guess that about 60 cases were aos.
So 2013 had 2193 selectees (fact)
Max case number around 1700 (guesstimate)
500 cases were holes (guesstimate)
1200 cases in total (guesstimate)
60 were aos (guesstimate)
Around half of the cases were filed (guesstimate)
730 visas were issued (fact)
Issuing 730 cases did not hit any limit (region or global)
I'm not sure if any of those statements help clarify your thinking.
I think that means that case numbers under 1700 are safe because comparison to last year. The 1700 should yield about 730 visas if things are pretty much the same as last year.
In 2014 the amount of visas issued to OC will probably reach a limit. We know there is around 5% more visas globally (because of NACARA unused visas) and there is compelling evidence to assume that OC has had a disproportionate increase in quota. Let's say (conservatively) that OC will get 900 visas this year. In fact that may have nbeen the target last year, but they failed to fill the quota. We don't know how much they underfilled the quota, it might have been 1 visa more than the 730 or 200 visas more than the 730. Using the 730/1700 ratio, a increase to 900 available visas should increase the max case number to 2143. That is getting better, but it is not quite what you want to see. 900 is quite a conservative estimate though - I think the number is higher than that.
I think I've explained this before, but looking at the split in selectees between the regions is probably a good sign of the approximate split in regional quota. So - if AF was supposed to get 50% of the final visa count they would have 50% of the selectees - make sense? In actual fact OC has generally been getting around 2% of the selectees so you could reasonably assume they should get 2% of the final visa split. That means they might have had a theoretical limit (quota) of about 1000 visas last year. This year, the OC selectee split is increased to 3%. That MUST mean something. It could be another artifact of the 2012 fiasco, but I don't think so. I think that means the quota will be higher - I wouldn't be surprised to see OC get 1200/1300 visas - and that would take care of 90% of the OC selectees.
Sorry - this is a rambling post - hopefully there is something in here that helps clarify some things...