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
Zebre vs Cheetahs-8.7-0.5+11.0
-6.5-3.2+8.6
-0.2-0.1+0.3
Scarlets vs Blues+0.5+0.4-1.8
+0.1+0.6-0.4
Ospreys vs Dragons-0.7+0.8+0.8
+0.6+1.3-0.9
Connacht vs Munster-0.1+1.1+0.0
-0.2+0.5+0.1
+0.0+0.1-0.0
Glasgow vs Kings-0.0+0.2+0.2
+0.0+0.1-0.1
-0.0+0.1+0.1
Treviso vs Edinburgh-0.1+1.9+0.0
Ulster vs Leinster-0.0+0.5+0.0

What If

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

100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsERCC1234567Count
7215-0-0InYes1000225,647
7014-1-0InYes954073,142
6814-0-1InYes9370788,238*
6613-1-1InYes81190943,483*
6413-0-2InYes752415,145,760*
6212-1-2100.0%Yes5541405,433,532*
6012-0-3100.0Yes51454017,134,191
11-2-2100.0Yes31561302,782,352*
5811-1-3100.0Yes285715017,757,921
10-3-299.9Yes1356310875,456*
5611-0-4100.0100.0%245817043,016,790*
10-2-399.8100.0115534008,385,703
5410-1-499.8100.0953370040,167,307
9-3-398.5100.033857102,414,947*
5210-0-599.7100.0851410076,374,582
9-2-498.0100.0235602017,499,048*
509-1-597.6100.02336220064,361,794
8-3-491.699.1017748004,375,026*
489-0-697.0100.02316530100,457,745
8-2-590.198.801674100024,297,001
7-4-475.988.906702310730,334*
468-1-688.398.2014741200075,374,287
7-3-572.385.30567261005,492,075*
448-0-786.497.501274130099,442,527
7-2-669.082.004652920025,019,662
6-4-545.346.3014446900794,947*
427-1-765.477.903623230065,622,446
6-3-640.639.701404811104,900,603*
407-0-861.773.303593530074,690,475
6-2-736.634.2003649131018,853,446
5-4-615.37.1015483160601,203*
386-1-832.528.6003251161042,659,828
5-3-712.55.10124534703,131,231*
366-0-928.623.6002851192042,561,461
5-2-810.03.5010423710110,715,344*
345-1-98.12.508394012120,626,441
4-3-81.50.10118443161,425,022*
325-0-106.41.606364215118,264,631
4-2-91.00.00115423584,260,531*
304-1-100.70.001123939117,742,627*
284-0-110.50.00093741125,783,400
3-2-100.0No021848331,186,952*
263-1-110.0No011446391,921,568*
243-0-120.0No011043471,529,248*
222-1-12OutNo022573319,930*
202-0-13OutNo012079223,853*
181-1-13OutNo079331,301*
161-0-14OutNo059519,753*
140-1-14OutNo1991,450
120-0-15OutNo0100172,479
Total:75.3%79.4%5214917521966,608,720

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs