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[FRC Blog] Frank Answers Friday: Championship Slots
Posted on the FRC Blog, 8/28/15: http://www.usfirst.org/roboticsprogr...pionship-Slots
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Not a terribly satisfying answer, but a reasonable one.
Does anyone have a proposal that could be debated/sent to Frank? |
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The only solution to this that I can think of is to offer waitlist teams based on geography and performance in the season, instead of first cone first serve or time since last championship.
There would need to be some sort of ranking system for performance that normalizes the performance within a region ( maybe a modified version of the district point system). There would definitely be some issues as the algorithm would need to take into account quite a few different things. For instince there would always be a debate about which regions get priority as it would be nearly impossible to perfectly balance the regions. It would also be quite a bit of work for FIRST to inform teams and make these decisions, which for the most part only affect a few teams. Another method of implementation might be to modify the wildcard system so that it continues to pass down until it's used. This would be problematic when you get to the semi finalists as then you would have to bring scores and rank( pre elims) into the picture and this get equally as muddy. For example should the 2nd round pick on the #3 alliance who was a semifinalist advance before the #5 alliance captain that got put out in the quarter finals? Wildcard right now is a good thing that does help cover some inequalities at the region but it also does influence alliance selection as teams who thin they can't win will consider which situation best earns them a wildcard spot, I am not sure what an expanded version of this system would do. Though question that would take some serious thought to figure out a reasonable solution, if in fact it is worth solving at all because of the small number of teams this effects each year. |
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My proposed solution is three-pronged:
I put together a Google Spreadsheet demonstrating my proposal. |
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Another issue is the fact that a district gets a number of spots proportional to the size of the district and teams in the district are still eligible to enter the lottery. So in at least a couple of instances last season "extra" teams from a district were awarded spots at CMP. Lottery spots were also awarded before the end of the regular season. Now I understand that it was done to ensure that declines were available to be passed down and that teams had more time to make arrangements but it did have some interesting effects. It made some Districts send more teams than their allotment in addition to those that were pre-qualified. (PNW had two teams that won the lottery, and they earned a spot pushing their earned spot down to the next teams in the rankings) It also may have resulted in more wildcard spots being generated at week 6 Regionals, though I do not know that for a fact. IF that did happen then teams attending week 6 events had an even greater chance at earning a wild card spot than they already had. One thing that I think might be a good option is to reserve a number of lottery spots and remove them from the available spots when calculating the number of spots for a district. FIRST does want teams to be able to attend CMP occasionally even if they are not able to meet the performance standards necessary. (I know that some people don't like that idea but FIRST has determined that best suits their goals, so it is what it is, and I'm not trying to restart that debate.) So how about something along these lines, now the numbers are just pulled out of a hat because I really don't know the real numbers for the upcoming year with all the new districts which are causing some Regionals to go away and a couple of new Regionals that are supposed to happen. Say there are 250 spots that could potentially be earned at Regionals and teams are 50% Regional and 50% District. So that means that there would be 250 spots to divide by the districts based on their relative size. That would mean there would be 500 spots that could be earned subtract that and the number of prequalified teams which I'll call 25 for the sake of this discussion and you have 75 spots reserved for the lottery. That would mean that the proportion of District teams vs Regional teams attending CMP would be relative to the respective proportion of all teams, less the fudge factor caused by pre-qualified teams and the inevitable randomness of the lottery winners. Of course that would still not make it so individual states got proportional representation due to the different size of Regionals and the fact that sometimes teams earn spots outside of their home state. Of course the fact is that not all states have events and for some locations an out of state event is more convenient as a team's first or second play. The ultimate solution of course is for all teams to participate in the District system but the District system is more work than the Regional system and some areas are a long way from having the number of teams to make the District system viable let alone having the ability to put the infrastructure in place to make it happen. |
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One thing I'd really like to see happen is a way for the best individual team at a regional to get to champs. The way things currently stand, districts do a much better job of getting the top robots to champs than do regionals. Whether that happens through an existing slot like Engineering Inspiration, or some other method I don't care.
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I find it interesting that according to the survey about two championships the most important element of the championship is 'Seeing and competing with the teams with the best robots in FRC' yet we are currently discussing how to distribute the championship slots fairly among district regions and regional regions?
Do people feel that we can have both of these? Can we properly represent all regions while still having the experience of seeing and facing the best robots in FRC? Please don't turn this into a discussion about two championships. That horse has been beaten twice already. |
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Of course, solving that issue is a fairly "interesting" "little" problem... |
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I wonder if the FRC community should change our expectation of how CMP slots ought to be allocated?
For example, would it be more effective* if CMP slots were allocated to states, or district systems that combine states, in proportion to the total number of official event matches played in each state or district before CMP, rather than to the number of teams? ------- *I expect that reasonable people will disagree on how "effectiveness" ought to be defined and measured. |
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Until all teams are under the District System, the regional slot allocation should be what we stay with. |
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Maybe your saying make the Excellence In Engineering award qualify a robot to worlds too? |
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And most of the times judges don't get to watch many of the matches. |
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Points Team Selection Finish AwardsWinners: 303 (prequalified, Mount Olive Chairman's), 2590 (Montreal Winner), 3340 CA: 1923 (prequalified, TVR EI) EI: 3314 RAS: 5666 Generating 3 wild cards: Current System: 11, 193, 1257 District points: 11, 193, 4285 Looking at the OPR for that event, 4285 averaged ~43 points per match, and 1257 ~21 points per match. Using district points for wildcards sends a slightly different but more competitive set of teams to CMP. |
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And I just said "That's the point." Having judges do what they do isn't about objectively determining who the "Innovation in Controls" award winner should be- it's about exposing industry leaders who are often judges to these amazing students and exposing these students to industry leaders. Ex: I talk to Team A and Team B, and Team A's students tell me in detail about their sloppy control system for their mechanism, while Team B wins the regional with their tightly and highly controlled mechanism but can't discuss it with the judges. I, as an FRC person who understands what these students are doing, might still award the award to the winning team, whereas an outsider judge will award it to the team who can talk about what they built better. That is (I think) an intentional part of the system. I place more focus on results, whereas a non-FRC person will place more emphasis on the attempt and the innovation than the results, while also learning about what FIRST-er's do. I think the main problem with the regional system is when finalists aren't invited to championships or when the second best robot at an event loses in the semifinals because they were on the wrong side of the bracket or something. What if (bold idea), before week 7, FIRST polls a number of experts on who the best 20 or so teams to not make championships are (kind of like this, but two weeks earlier) and invites them to the championship event. |
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1) FIRST polls experts on best 50 teams to not CURRENTLY make championships. (Trust me, there's a reason this number is so high.) This happens sometime around Week 6. 2) FIRST looks at who still has a chance to qualify (playing Week 7, maybe playing Week 6), or is near the top of the waitlist. These teams are set aside. 3) FIRST looks at geography and representation. Teams from underrepresented areas get higher priority than teams that are from fully represented areas. 4) The combined "best teams" and "underrepresented areas' teams" sorts determine the order of offering--but only to the top 25 on the combined list. 5) After Week 7 plays, the list is revisited. The bottom 25 and the teams that were set aside are now eligible for invites. |
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Any sort of equal representation system based on region will do this, and that's (I think) an unavoidable problem, albeit a lesser problem compared to how championship slots are currently allocated to regionals. |
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So what I'm looking at is that you take the top X that aren't going, and those that are from an UNDERrepresented area get first crack at going, all other things being equal. It's a hybrid system: top X teams that aren't currently going, ranked 1-X, combined in some way with the underrepresentation status of their respective areas to produce the final priority list on who gets asked. It's not about being from an area with good teams killing your chances. It's about answering the original question (not the somewhat-related but tangential current main focus of the thread, how do we get all of the best teams to the Championship). |
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Gregor, I'm aware of that. But there are a lot of areas that are under-represented, and they're all regional areas. (And there are over-represented areas, too. Not all of those are necessarily regional areas. But that's another discussion altogether.) |
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Food for though, given the current HQ direction we probably aren't that many years away from a time where a teams ability or willingness to pay to attend the Championships could become the limiting factor.
In 2018 will ~40% of FRC teams be able to attend a Championship? If that is followed up with 3Champs, will 50%+ of the teams in FRC be able to afford the trip? If we sit on this issue for a few years, it just might solve itself. |
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I've thought a bit about this system, and have an idea for how to change it:
This system could potentially work well to adjust for variation of skill between districts. If a district's teams don't fare well at champs, indicating a weaker district, it will send fewer the next year. If a district has many successful teams at champs, it will send more (probably also competitive) teams to champs. The system should adjust itself. However, it may also get out of balance, over-favoring some districts over time. This could probably be fixed by increasing the fraction of spots awarded based on population to more than one half. I would run the numbers, but there are many waitlist teams and I don't want to have to figure out manually which teams attended from the waitlist and which ones didn't. |
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I don't think that that is guaranteed to work in the long term, because it doesn't address the underlying problem that you send fewer teams to Champs, you get fewer Champs points. Could we perhaps solve that by taking the median* of the calculated scores from each district and comparing them, instead of the sum? * Or mean; I'm not sure if it'd be good to minimize the effect of outliers. |
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Thirty to forty team regionals tend to have a higher representation at champs. (The largest Canadian regional last year had 48 teams, the smallest couple only had 30. Not picking on Canada, but based on the maple leaf I'm guessing that was what you were referring to.) Past that, week 1 regionals are over-represented and week 6 regionals are underrepresented. That's simply because each regional is allocated 6 slots and a maximum of 3 wildcards regardless of size and once a team has won, winning again at another event can prevent another team from going to St. Louis. A week 1 regional will always send 6 teams to worlds regardless of size. Last year, North Star in Minneapolis (week 6) sent two new teams out of 60 teams attending to worlds. So, what would I do? Assuming a goal of 10% of regional participants moving to worlds. Set a "wildcard threshold" of floor(regional participants /10) So, if the regional has 30 participants the wildcard threshold is 3, if it's 67 it's 6. Now, at a regional as many as six teams may go on to worlds. If the winning alliance, Engineering Inspiration, Chairman's, and Rookie All-star are all different teams who aren't already going to worlds they all go. But if those winners or some of those winners are already going to worlds you'd look into creating wildcards. Let's say that of those 6 winners there were 4 already going (only generating 2 new invitations) either because of duplicates at the event or previous wins. So, if this is a 30 team regional it would generate 1 wildcard slot, if it were a 60 team regional it would generate 4 wildcards. The first 3 wildcard slots are easy and already defined, that's the members of the finalist alliance. Past those first 3, I'd suggest moving down the seedings established by the qualification matches so that the highest seeded teams who weren't already going get invites. It would still be advantageous to go to a week 1, or 30 team regional, but not quite as much as it currently is. |
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That generated a possibility of at most 3 wild cards even though only 2 of a potential 6 teams had received invites. Of those three wild cards allocated to the finalist alliance, 5576 had already won rookie all star so it didn't use one. That essentially left championship spots on the table. Under the system I proposed, 2 additional championship spots would have been offered to the highest seeded teams who weren't already advancing. That would have been the number 5 seed 3883 (Data Bits) and number 6 seed 2667 (Knights of the Valley). |
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To be honest, I don't really think that the under-representation in MN is a problem that HQ should even try to solve. The solution, plain and simple, is that if we want a higher representation at champs, we just have to create more events, either within the regional system or in a new district system.
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Edit: Also, the big issue with talking about how judging 'is' is that it varies from event to event because there's a fair bit of freedom in how exactly to get things done. In short, there's no One True Way. |
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To have true geographic representation you need to close borders otherwise what happens when someone from outside of that state border comes in and is in the position to get one of those for lack of a better term "bonus spots"? Do they get passed over because they are not from within that political boundary? Do they get the spot and risk the "but they stole our spot"? |
Re: [FRC Blog] Frank Answers Friday: Championship Slots
A couple of comments:
1. One of the most striking issues I find is that no one has mentioned the problem of awarding Championship slots to districts based on their proportion of the FRC population in a post-Championsplit world. Using 2015 figures, and assuming them to remain constant for this discussion, Michigan (not picking on MI, just the easiest to make the point) teams comprised 11.86% of registered FRC teams which corresponds to roughly 71 slots for St. Louis. The same should hold true for 2016. However, beginning in 2017, Michigan's 345 teams will represent either 11.86% of the overall FRC teams or 23.73% of the corresponding Championsplit pool. Given that both Championsplit venues will host 400 FRC teams, will Michigan teams comprise 47 slots or 95? Clearly, something has to change with respect to the awarding of Championship slots on a proportional basis to district participants. 2. I have posted previously about the need for there to be a single set of consistent and fair qualification criteria for Championships. This post by BMSOTM looks like a potential solution, (assuming a return to W-L-T). The district point system has always served as a comprehensive way of separating wheat from chaff and advancing quality teams to Championships. Quote:
Glad to see Frank is keeping an open mind on this issue as I believe the application of a district scoring model to the FRC population as a whole is a potential solution rather than a complicating factor. In 2015, we implemented average scores. Could apply the same methodology to account for teams attending 1 or more events with the top 400 teams advancing to their corresponding Championsplit venue. On the minus side, teams near the cut-off point face uncertainty in the closing weeks of the season but how does that differ from the current system used by districts? Such a change would not necessarily address under-representation of geographic areas at Championships but would level the playing field to the greatest extent possible. |
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The issue is still significant for the allocation of post-Championsplit district slots for their corresponding venues. Just the spread is now 47 to 95 slots in the case of Michigan. |
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