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I shall start with the timeline and description of PP Weight Rating.  I realize it started terribly, didn't really show things properly at first, and is only in the most recent version getting better.  Now that dossier files (and by extension, VBAddict) now have a better statistic I can use for defensive rating of the tanks (Shots Taken Without Damage vs. Damage Received Ratio), it will really help boost heavily armored tanks and hurt lightly armored tanks, like the rating should.

 

Anyway, back in the beginning, I had this bright idea of finding a formula that would show overall balance of the tanks we play in a class/tier.  I figured this would do 2 things: Prove 'subjective experience' from the unicums right, and give a better insight into how WG nerfs/buffs tanks (they don't do it purely off winrate, but some sort of internal formula showing unbalance).  I decided to use VBAddict as the basis for the stats.  It is not perfect (unless you have access to the internal WG Database, no method for obtaining stats is perfect).  However, it offers an easily accessible method for obtaining stats, and also helps that it shows only the past 30 days stats, so that it is not just an 'overall that adds up over time', but a more dynamic rating that changes from patch-to-patch and more readily shows how patches change things.

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THE FIRST ATTEMPT

 

In April of 2013, PP Weight Rating was born.

 

http://forum.worldoftanks.com/index.php?/topic/229413-pp-weight-rating-what-is-it-and-how-does-it-work/page__fromsearch__1

 

My first attempt was terrible.  I started with raw data and got results that really didn't jive with reality.  After rough going, I got the formula into a basic version which ended at Version 4.  That formula is as follows:  

 

{[(RAW DPG/THEORETICAL DPG)*100]+[(ASSIST DPG/1000)*100]+WINRATE+[(POTENTIAL RECEIVED DPG/ACTUAL HP)*100]+SURVIVAL RATE}/5 = NORMALIZED PP WEIGHT

 

The WGForums rejoiced that someone was taking time to attempt to do this, even if their attempt was sloppy.

 

_________________

 

THE SECOND ATTEMPT

 

In May of 2013, the second set of ratings came out.  

 

http://forum.worldoftanks.com/index.php?/topic/238867-pp-weight-rating-may-2013-edition/page__fromsearch__1

 

I continued to use Version 4.0 of the formula, as by that time, I had setup my spreadsheet with it and it was easy to just plug-n-run numbers.  However, my methods were still called into question by those with better knowledge of the workings of the game, as I had some strange anomalies in the results.  However, Congratulations were given as I was not giving up despite initial detractors, was willing to work on the formula (did not claim to be a know-it-all), and was giving some sort of basis to show balance that players otherwise had no real ability to do.

 

________________

 

THE TWEAKING

 

A couple of days after the May 2013 post, the Formula was tweaked.

 

http://forum.worldoftanks.com/index.php?/topic/239806-pp-weight-rating-formula-help-me-tweak-it/page__fromsearch__1

 

I got most help in PM's either on the WGForums or from Reddit.  The formula ended up with Version 5 as follows:

 

 [Damage Ratio + {Assist DPG/(Tier * 100)} + Winrate + Damage Received Per Match Ratio]/4 = PP Weight

 

________________

 

FORMULA TWEAKED AGAIN AND THE THIRD RUN OF THE RATINGS

 

I missed posting a rating in June for some reason.  But by the end of June, I had worked hard on the formula and had tweaked it even further and it is currently on Version 6.  The tweaking helped to normalize it for tier weights.  The ratings were well received this time as the new, tweaked, version 6.0 formula really got the charts much more in line with what is accepted reality, though there were some shockers thanks to 8.6 and the intial 1 1/2 weeks of stats from 8.6.  

 

http://forum.worldoftanks.com/index.php?/topic/255957-pp-weight-rating-july-2013-edition/page__p__4920781#entry4920781

 

Version 6 of the formula is as follows:  

 

{Damage Ratio + {[(Assist Radio + Assist Tracks)/(Tier * 100)]*100} + Winrate + Recieved Damage Ratio}/4 = PP Weight

 

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FOR THE 7TH TIME, THE FORMULA IS TWEAKED

 

By the time I was partially done doing the July 2013 rating, I noticed that VBAddict had a new stat for defense: Shots Received Without Damage.  Instead of a formula for Damage Received divided by Hitpoints Multiplied by 100 to get the ratio from 1-100%, This instead was a straight up "How much armor do you have as this is the percent of shots you took that did 0 damage."  Thus, a better stat for defensive ratings of tanks was found.  But, for completion sake, I finished up the ratings with version 6.0 of the formula.  Version 7.0 is as follows:

 

{Damage Ratio + {[(Assist Radio + Assist Tracks)/(Tier * 100)]*100} + Winrate + Shots Received Without Damage}/4 = PP Weight

 

______________

 

August 2013 PP Weight Rating Released

 

http://forum.worldoftanks.com/index.php?/topic/274823-pp-weight-rating-august-2013/

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WHAT IS EACH PART OF THE FORMULA REPRESENTING?

 

Damage Ratio = Percent of Damage Output Compared to Hitpoints. It is commonly accepted that a 'good tanker' puts out at a minimum as much damage a match as he/she has hitpoints.  This is a hindrance to tanks with a lot of Hitpoints (like German Heavies, the TOG II*, etc.) and a boost to tanks with fewer Hitpoints. This is a Measure of Offensive Ability of that tank.

 

Assist Ratio = Now that 8.6 is here, Assist Damage is broken up into 2 Categories. As before, I have found that without exception, that even combined together, both assist damage stats do not equal more than Tier * 100, so that is the ratio used to get a scale of 1-100% for this category. It is commonly accepted that a 'good tanker' can stay alive and get a lot of spotting damage or keep a target tracked (if he has no other shot) so that his teammates can finish off the tank if he is currently unable to do so.  This is a boost to tanks with good view range/speed, and a hindrance to tanks with poor view range/speed.  This is a measure of Support Ability of that tank.

Winrate = Self explanatory. Measure of player skill that can 'override' all other stats the tank has.  However, sometimes winrate comes into play in ways that are unexpected: Some tanks that Unicums consider great have poor winrates, for example, despite Unicum skill.

 

Shots Received Without Damage = A measurement of how many shots a tank took directly that did 0 damage to that tank.  It is commonly accepted that a 'good tanker' knows his tank well and can thus angle it to reduce or even completely eliminate damaging shots.  This is a tremendous boost to heavily armored tanks, like say, German Heavies, and a hindrance to less armored tanks, like say, French Heavies.  This is as it should be as German Heavies have much better armor than French Heavies.  

 

_____________

 

STRANGENESS ENCOUNTERED WHILE RUNNING STATS

 

Something that was shocking the first time I ran the stats was how well the Maus stacked up as a Support tank, with it's massive spotting damage ratings (at the time, 7th on the NA server).  As each iteration of the formula came along, and as the past few months have gone by, it has gone up in rating.  As of the July 2013 run of the stats, the Maus is currently #2 overall on the NA server for being a Support Tank, behind only the Bat Chat 25t.  Hard to believe, but the Maus is the 2nd best 'scout' in the game.  LOL.  

 

Another shocking thing was how much winrates changed over time.  Whenever a tank became 'flavor of the month', it's winrate would drop, while others around it would raise up.  

 

8.6 was a massive shock to winrates.  Out of over 230+ tanks, less than 20 had winrates go up since 8.6.  Winrates were down across the board an average of 3%.  Even the Foch 155, known for being OP, was sitting at an 'awe-inspiring' 50% winrate.  The sigma changes really had a massive effect on tank balance that I don't think we will really see until September.  I'm sure the August ratings will start to really show it, but September is probably where we will see new 'leaders' for best tank in many class/tier combos.

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~snippiest snip in snip history~

_____________

 

STRANGENESS ENCOUNTERED WHILE RUNNING STATS

 

Something that was shocking the first time I ran the stats was how well the Maus stacked up as a Support tank, with it's massive spotting damage ratings (at the time, 7th on the NA server).  As each iteration of the formula came along, and as the past few months have gone by, it has gone up in rating.  As of the July 2013 run of the stats, the Maus is currently #2 overall on the NA server for being a Support Tank, behind only the Bat Chat 25t.  Hard to believe, but the Maus is the 2nd best 'scout' in the game.  LOL.  

 

Another shocking thing was how much winrates changed over time.  Whenever a tank became 'flavor of the month', it's winrate would drop, while others around it would raise up.  

 

8.6 was a massive shock to winrates.  Out of over 230+ tanks, less than 20 had winrates go up since 8.6.  Winrates were down across the board an average of 3%.  Even the Foch 155, known for being OP, was sitting at an 'awe-inspiring' 50% winrate.  The sigma changes really had a massive effect on tank balance that I don't think we will really see until September.  I'm sure the August ratings will start to really show it, but September is probably where we will see new 'leaders' for best tank in many class/tier combos.

 

I want to see dem tanks that are going up...? It, interests me  :ph34r:

 

Im still sticking to the foch being broken... lol

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Of the tanks that went up in winrate?  Lemme go do a quick looksee.  If it isn't listed, then it dropped in winrate, or was introduced as a new tank in 8.6 (like the excelsior or the new arty).  All of these raised at least 1% winrate.  (compared to an average loss of 3-4% winrate, that is significant)

 

Tier 1 - MS-1, Leichtraktor, T1 Cunningham

 

Tier 2 - T18, SU-18, T2-LT, Vickers Mk II

 

Tier 3 - FCM36 PaK40, Valentine AT, M7 Priest, Pz 1C

 

Tier 4 - T40, SU-5, Valentine II, Matilda

 

Tier 5 - M10 Wolverine, S-35 CA, M41, 105 leFH18B2, AMX 13 105 AM 50, Chaffee, ELC AMX, KV-1

 

Tier 6 - M18 Hellcat, DIcker Max, VK2801, VK 30.01 (P), Type 58, KV-2

 

Tier 7 - SU-122-44, IS-2, WZ-132, 

 

Tier 8 - ISU-152, T-34-2, KV-5

 

Tier 9 - T95, Foch, Object 704, Centurion Mk 7/1, WZ-111 1-4

 

Tier 10 - IS-7

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Of the tanks that went up in winrate?  Lemme go do a quick looksee.  If it isn't listed, then it dropped in winrate, or was introduced as a new tank in 8.6 (like the excelsior or the new arty).  All of these raised at least 1% winrate.  (compared to an average loss of 3-4% winrate, that is significant)

 

Tier 1 - MS-1, Leichtraktor, T1 Cunningham

 

Tier 2 - T18, SU-18, T2-LT, Vickers Mk II

 

Tier 3 - FCM36 PaK40, Valentine AT, M7 Priest, Pz 1C

 

Tier 4 - T40, SU-5, Valentine II, Matilda

 

Tier 5 - M10 Wolverine, S-35 CA, M41, 105 leFH18B2, AMX 13 105 AM 50, Chaffee, ELC AMX, KV-1

 

Tier 6 - M18 Hellcat, DIcker Max, VK2801, VK 30.01 (P), Type 58, KV-2

 

Tier 7 - SU-122-44, IS-2, WZ-132, 

 

Tier 8 - ISU-152, T-34-2, KV-5

 

Tier 9 - T95, Foch, Object 704, Centurion Mk 7/1, WZ-111 1-4

 

Tier 10 - IS-7

 

Do you believe that those numbers reflect these tanks getting better or their counterparts getting worse?  EG, part of the big blob at tier 5 is likely due to the HEAT derp nerfs.

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When it comes to why?  I think for the most part, it is leveling of the playing field thanks to the sigma change (thus the mass loss in winrate).  However, the ones that were helped the most, for the most part, tended to be innacurate tanks with big, slow guns, or with auto-cannons.  

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