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
Scarlets vs Blues-5.8-5.0+6.2
-7.7-5.9+8.3
-0.3-0.3+0.4
Zebre vs Cheetahs+0.2+2.1-0.4
-0.0+1.1-0.1
-0.0+0.1+0.0
Connacht vs Munster+0.2+1.6-0.4
-0.1+0.9-0.0
-0.0+0.1+0.0
Ospreys vs Dragons-0.8+0.6+0.7
+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+1.1-0.1
Ulster vs Leinster-0.1+0.8-0.0

What If

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

100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsERCC1234567Count
6415-0-0InYes1000060,430
6214-1-0InYes9736,882
6014-0-1InYes964076,342*
5813-1-1100.0%Yes88110095,977*
5613-0-2100.0Yes851510562,073*
5412-1-2100.0Yes682930639,150*
5212-0-399.9Yes65323002,181,801
11-2-299.4Yes42461110353,647*
5011-1-398.9100.0%3847141002,585,480*
4811-0-498.5100.03448172006,543,931
10-2-392.299.91444347001,305,694*
4610-1-489.699.8124137101006,776,213
9-3-367.794.12214427500405,400*
4410-0-585.799.5937391310014,382,381
9-2-460.589.421742318103,277,546*
429-1-554.184.61143935101013,553,435
8-3-422.834.30320422960914,884*
409-0-646.476.51113538142023,978,520
8-2-518.025.802164033915,746,272
7-4-43.61.5042343264171,963*
388-1-613.518.10112373712120,323,774
7-3-52.40.800218423161,464,458*
368-0-79.811.9019324016230,824,885
7-2-61.60.500214403697,659,301
6-4-50.10.0003244824240,285*
347-1-71.00.20011137401223,229,951
6-3-60.10.00022048301,709,201*
327-0-80.60.1001833431530,816,005
6-2-70.00.00021647357,660,383
5-4-60.0No0053658239,841*
306-1-80.00.000113454120,333,798
5-3-70.0No00433641,464,908*
286-0-90.00.000110434723,979,193
5-2-80.0No00329695,917,529*
265-1-90.0No002257313,554,579
4-3-8OutNo001387915,799*
245-0-10OutNo01227714,381,152
4-2-9OutNo0010903,277,641*
224-1-10OutNo008926,770,357
3-3-9OutNo0397406,384*
204-0-11OutNo007936,537,929
3-2-10OutNo002981,305,601*
183-1-11OutNo02982,589,422*
163-0-12OutNo01992,181,832
2-2-11OutNo0100354,434*
142-1-12OutNo0100638,006*
122-0-13OutNo0100563,575*
101-1-13OutNo010096,284*
81-0-14OutNo010076,292*
4-6OutNo10067,296*
Total:19.4%24.9%361014182226313,198,116

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs