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-4.2-3.8+5.6
-7.6-6.1+10.2
-0.2-0.2+0.3
Scarlets vs Blues-0.6+1.8+2.0
-0.0+0.9-0.2
Ulster vs Leinster-0.2+1.8+0.1
-0.1+0.7+0.0
Treviso vs Edinburgh-0.2+1.1+0.1
-0.3+2.5+0.2
-0.0+0.1-0.0
Glasgow vs Kings*+0.0+0.1-0.0
+0.0+0.0-0.1
Zebre vs Cheetahs-0.5+2.2+0.4
Connacht vs Munster-0.1+0.6+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
6815-0-0InYes1000173,835
6614-1-0InYes9823,552
6414-0-1InYes964048,226*
6213-1-1InYes8812073,210*
6013-0-2100.0%Yes831610496,961*
5812-1-299.9Yes6233400659,371*
5612-0-399.6100.0%54387003,022,343*
5411-1-397.5100.0284821203,550,924*
5211-0-496.9100.02548243010,195,695
10-2-387.499.99374112002,051,908*
5010-1-484.799.973444150011,988,411
9-3-362.298.4116453530722,195*
4810-0-581.199.953045180028,492,530
9-2-456.497.31134340406,523,601*
469-1-551.796.6110414350029,960,851
8-3-424.979.502235717102,028,976*
449-0-646.395.108384760058,501,418
8-2-520.673.9021958202014,460,159*
428-1-617.569.6011658232054,393,455
7-3-54.831.50054541803,923,982*
408-0-714.363.9011457263089,821,993
7-2-63.726.6004424410022,277,325
6-4-50.54.9012251260697,220*
387-1-72.821.8003394612073,006,574
6-3-60.43.50019512915,365,828*
367-0-82.017.50023549140103,933,688
6-2-70.32.500175032125,735,551
5-4-60.00.10538533803,707*
346-1-80.21.800144936172,734,044
5-3-70.00.104355745,218,201*
326-0-90.11.200124839190,689,919
5-2-80.00.0043259521,615,742
4-4-70.00.001166914641,657*
305-1-90.00.0033062653,524,305
4-3-80.00.0001470163,588,968*
285-0-100.00.0022764759,181,303
4-2-90.00.00012691913,387,827*
264-1-100.00.00010692128,626,662
3-3-9OutNo0359391,703,055*
244-0-110.0No008692328,362,563
3-2-10OutNo0256425,616,065*
223-1-11OutNo02534511,329,970*
203-0-12OutNo0151489,670,127
2-2-11OutNo033671,558,937*
182-1-12OutNo0030702,817,481*
162-0-13OutNo026742,468,893*
141-1-13OutNo01288417,677*
121-0-14OutNo01090323,707*
100-1-14OutNo39727,542
80-0-15OutNo199190,586
Total:13.5%31.5%1392629275966,608,720

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs