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
Ospreys vs Dragons+6.3-5.1-5.8
+8.5-5.9-8.0
+0.4-0.3-0.3
Zebre vs Cheetahs+0.2+2.2-0.4
-0.0+1.1-0.1
-0.0+0.1+0.0
Connacht vs Munster+0.3+1.7-0.4
-0.0+0.9-0.0
-0.0+0.1+0.0
Glasgow vs Kings-0.8+0.7+0.8
-0.0+0.6-0.0
Scarlets vs Blues+0.7+0.6-0.8
-0.1+0.9-0.0
+0.1+0.1-0.1
Treviso vs Edinburgh-0.0+1.1-0.1
Ulster vs Leinster-0.0+0.9-0.0

What If

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

100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsERCC1234567Count
6415-0-0InYes99160,379
6214-1-0InYes9736,774
6014-0-1InYes964076,317*
5813-1-1100.0%Yes88120097,021*
5613-0-2100.0Yes851510563,698*
5412-1-299.9Yes6730300638,306*
5212-0-399.9Yes64324002,181,424
11-2-299.2100.0%41461210354,281*
5011-1-398.6100.03647151002,583,140*
4811-0-498.3100.03348172006,538,967
10-2-391.199.91343358101,303,503*
4610-1-488.899.8114037101006,779,352
9-3-365.394.42204329600405,780*
4410-0-585.399.6937401310014,391,666
9-2-459.190.121641328103,275,159*
429-1-553.685.81143935101013,551,430
8-3-421.735.60219422960914,696*
409-0-646.878.21113538141023,975,683
8-2-517.226.502154033915,913,570*
388-1-613.619.40112373712120,328,417
7-3-52.20.900218433161,463,405*
368-0-710.213.0019333915230,820,029
7-2-61.60.500215413587,663,269
6-4-50.10.003254824239,638*
347-1-71.00.30011138391123,232,334
6-3-60.10.00022148291,710,787*
327-0-80.60.1001934421430,822,483
6-2-70.00.00021748347,658,088
5-4-6OutNo053758240,585*
306-1-80.00.000114463920,326,033
5-3-70.0No00433631,466,614*
286-0-90.00.000111434523,979,756
5-2-80.0No00330675,742,560
4-4-7OutNo011684171,125*
265-1-90.0No002267213,558,791
4-3-8OutNo001387914,334*
245-0-100.0No001227714,381,583
4-2-9OutNo0010893,278,098*
224-1-10OutNo008926,777,536
3-3-9OutNo0397405,371*
204-0-11OutNo006936,539,098
3-2-10OutNo02981,304,255*
183-1-11OutNo02982,586,230*
163-0-12OutNo01992,182,589
2-2-11OutNo0100354,004*
142-1-12OutNo0100637,852*
122-0-13OutNo0100561,547*
101-1-13OutNo010096,711*
81-0-14OutNo010076,712*
4-6OutNo10067,136*
Total:19.4%25.3%361015182226313,198,116

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs