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
Connacht vs Munster+7.6-4.6-7.2
+8.6-6.1-8.0
+0.4-0.3-0.4
Zebre vs Cheetahs+0.2+2.2-0.4
-0.0+1.2-0.1
-0.0+0.1+0.0
Scarlets vs Blues+0.8+0.7-0.9
-0.0+0.9-0.1
+0.1+0.1-0.1
Ospreys vs Dragons-0.8+0.7+0.8
+0.1+1.0-0.2
-0.1+0.1+0.1
Glasgow vs Kings-0.8+0.7+0.7
-0.0+0.6-0.0
Treviso vs Edinburgh-0.0+1.2-0.1
Ulster vs Leinster-0.0+0.9-0.1

What If

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

100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsERCC1234567Count
6415-0-0InYes100060,507
6214-1-0InYes98206,799
6014-0-1InYes973076,280*
5813-1-1InYes9010096,718*
5613-0-2100.0%Yes871200561,612*
5412-1-2100.0Yes722620639,038*
5212-0-3100.0Yes69292002,182,971
11-2-299.7100.0%4744800353,861*
5011-1-399.3100.04246111002,584,653*
4811-0-499.0100.03847131006,541,463
10-2-394.299.91747305001,307,478*
4610-1-492.199.91444347006,775,357*
9-3-372.896.13254523400405,508*
4410-0-588.899.71141371010014,391,303
9-2-465.992.622043286003,273,796*
429-1-559.689.2217413281013,553,738
8-3-427.039.60423432550916,262*
409-0-651.882.61133836111023,972,807
8-2-521.130.402194130705,917,522*
388-1-616.522.90215393410120,328,993
7-3-53.11.100321432851,466,790*
368-0-712.115.90111353814130,825,010
7-2-62.10.600217423277,656,005
6-4-50.20.0004264822239,902*
347-1-71.30.3001133937923,227,011
6-3-60.10.00032248261,709,468*
327-0-80.80.20011036411330,824,368
6-2-70.00.00021948317,661,037
5-4-60.0No0063955239,712*
306-1-80.00.000115473620,329,817
5-3-70.0No00435601,467,665*
286-0-90.00.000112454223,967,650
5-2-80.0No00332655,745,642
4-4-7OutNo011783171,567*
265-1-90.0No002286913,548,419
4-3-8OutNo001485915,797*
245-0-100.0No002247414,379,658
4-2-9OutNo0012883,279,998*
224-1-10OutNo0010906,779,682
3-3-9OutNo0496406,977*
204-0-11OutNo008926,541,197
3-2-10OutNo03971,304,573*
183-1-11OutNo02982,587,280*
163-0-12OutNo02982,179,975
2-2-11OutNo00100354,892*
142-1-12OutNo0100637,685*
122-0-13OutNo0100563,448*
101-1-13OutNo010096,497*
81-0-14OutNo010076,414*
4-6OutNo10067,314*
Total:20.9%26.4%371115182224313,198,116

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs