How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

If winner is:HomeDrawAway
Week of 10/27100.0*Chance in playoffs100.0*ERCC100.0*Average seed
Ulster vs Leinster+3.9-4.7-6.7
+2.2-2.9-3.7
+0.2-0.2-0.4
Ospreys vs Dragons+1.0+0.9-1.4
+0.2+0.5-0.3
Treviso vs Edinburgh-0.2+2.0+0.1
-0.0+0.7-0.0
Scarlets vs Blues-0.3+0.9+0.9
+0.0+0.2-0.1
-0.0+0.1+0.1
Glasgow vs Kings+0.0+0.0-0.1
Zebre vs Cheetahs-0.1+0.6+0.1
Connacht vs Munster-0.1+0.1+0.0

What If

Chances based on how well the Ulster finish out the regular season.   Explain

100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsERCC1234567Count
7615-0-0InYes100297,464
7414-1-0InYes1000160,729
7214-0-1InYes10001,620,407*
7013-1-1InYes10001,830,067*
6813-0-2InYes99108,377,380
12-2-1InYes9820982,212*
6612-1-2InYes97309,325,334*
6412-0-3InYes964027,429,380
11-2-2InYes901004,515,231*
6211-1-3100.0%Yes87130026,819,730
10-3-2100.0Yes7425101,341,959*
6011-0-4100.0Yes84150060,038,103
10-2-3100.0Yes69292012,215,752*
5810-1-4100.0Yes65323053,050,898*
9-3-399.9100.0%44479003,245,374*
5610-0-5100.0Yes61364093,131,797
9-2-499.9100.04049110021,181,250
8-4-398.9100.020532610581,345*
549-1-599.8100.03551140073,779,963*
8-3-498.4100.01751312005,121,180*
529-0-699.7100.031521700105,848,099*
8-2-597.8100.014493520026,166,606
7-4-490.099.6434521000805,749*
508-1-696.9100.011473930074,470,638
7-3-587.099.33295512105,561,509*
488-0-795.9100.09444340089,788,360
7-2-684.399.122656151023,187,905*
6-4-561.390.70105133600746,703
467-1-780.998.722257181055,471,833*
6-3-655.887.10748368004,256,819*
447-0-877.398.1119572120057,402,037
6-2-750.383.1064439101015,409,740*
426-1-846.180.4044241121030,638,173
5-3-720.641.301204529502,317,020*
406-0-941.376.1033843141027,640,692
5-2-817.135.200174332707,201,651*
385-1-914.530.7001442358012,500,546
4-3-83.65.2042546251890,400*
365-0-1011.925.7001240381009,949,197
4-2-92.73.70321462912,414,245*
344-1-102.02.60218453323,942,887*
324-0-111.31.60114424033,190,228*
303-1-110.10.0003266011814,521*
283-0-120.00.002216115579,767*
262-1-120.0No0075934111,422*
242-0-130.0No005554069,953*
221-1-13OutNo0136639,177*
201-0-14OutNo131685,005*
180-1-14OutNo1387364
160-0-15OutNo496171,919
Total:87.9%94.6%3331248310966,608,720

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs