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-7.4-6.1+7.9
-9.5-6.8+10.1
-0.4-0.3+0.4
Scarlets vs Blues-1.5+1.1+1.4
-0.1+1.0-0.0
-0.1+0.0+0.1
Treviso vs Edinburgh-0.0+2.2-0.2
-0.0+1.3-0.1
-0.0+0.1-0.0
Ulster vs Leinster-0.1+2.2-0.1
-0.1+1.0-0.0
-0.0+0.1-0.0
Glasgow vs Kings+0.5+0.4-0.5
-0.1+0.7*-0.0
+0.1+0.0-0.1
Zebre vs Cheetahs-0.0+1.3-0.1
Connacht vs Munster-0.1+1.1-0.0

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

What If

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

100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsERCC1234567Count
6815-0-0InYes100060,368
6614-1-0InYes10006,767
6414-0-1InYes99176,385*
6213-1-1InYes973096,722*
6013-0-2InYes9640561,641*
5812-1-2100.0%Yes891100637,713*
5612-0-3100.0Yes86140002,181,724
11-2-2100.0Yes7226200354,314*
5411-1-399.9Yes66303002,585,047*
5211-0-499.8100.0%62345006,540,149*
10-2-398.7100.03945141001,304,583*
5010-1-497.9100.03447172006,779,256
9-3-390.399.9144234910405,440*
4810-0-596.8100.029472130014,386,557*
9-2-486.199.7113837121003,278,581*
469-1-582.199.6834401620013,557,226
8-3-455.090.811539341010916,340*
449-0-676.799.1629412030023,976,066
8-2-547.184.2111353714205,914,501*
428-1-640.577.8183140172020,323,520
7-3-514.027.8011337361211,464,534*
408-0-733.368.4062741224030,814,859
7-2-610.519.7011034391517,660,365
6-4-51.61.1021542356240,235*
387-1-77.613.0017304219223,230,191
6-3-61.00.600112393991,709,566*
367-0-85.38.2005254324330,820,033
6-2-70.70.300193643117,663,026
5-4-60.00.002195128240,251*
346-1-80.40.1000732461420,334,215
5-3-70.00.0011650331,466,154*
326-0-90.20.100528491823,973,051
5-2-80.00.00011349385,916,168*
305-1-90.00.00110474213,549,707
4-3-80.0No0033463914,969*
285-0-100.00.0008454714,384,799
4-2-90.0No00231673,277,795*
264-1-10OutNo0228716,782,826
3-3-9OutNo001584405,873*
244-0-110.0No00125746,540,166
3-2-10OutNo0013871,306,031*
223-1-11OutNo0011892,585,913*
203-0-12OutNo009912,181,007
2-2-11OutNo0496353,662*
182-1-12OutNo0397638,628*
162-0-13OutNo0298561,323*
141-1-13OutNo19996,362*
121-0-14OutNo010076,159*
100-1-14OutNo01006,888
80-0-15OutNo010060,460
Total:30.0%40.5%6101417192014313,198,116

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs