Declan Kidney's side have amassed 21 points, the only 100 per cent record in the competition this season, from their five Pool 2 wins and take on Benetton Treviso at Lansdowne Road in Round 6 on Saturday looking to secure a home quarter-final as one of the top four Pool winners.
But the other seven quarter-final places are far from decided with 13 teams still in the hunt for the remaining seven prestigious knock-out places.
The calculators will be out this weekend, with Munster in the driving seat in their pool, safe in the knowledge that a win over NEC Harlequins will secure a quarter-final berth.
Following their gritty win over Gloucester last Friday night, Ulster are holding on to their outside chance of qualification, with a bonus point win over Cardiff their main aim. After that, it is essentially out of their hands.
Here is how the quarter-final qualifiers - and rankings - will be determined:
HOW THEY QUALIFY
1(a) Pool MatchesFour points for a win, two points for a draw (match points). A bonus point will be earned by a team scoring four or more tries and by a team losing by seven or less points. The six Pool winners and two best placed runners-up will qualify for the Quarter-Finals and will be decided by the followingcriteria:
(i) the Pool winner will be the Club with the highest number of match points earned in each Pool. The runners-up will be the two second placed Clubs from all six Pools with the next highest number of points. For the Quarter-Final round, the Pool winners will be ranked 1 - 6 in terms of the number of points earned. The runners-up will be ranked 7 and 8.
Clubs in the same Pool:
Clubs from different Pools:(iii) if still unresolved, or the teams have not played each other previously in the Pool stage, qualification/ranking will be based on:(a) the number of tries scored in all Pool matches.(b) aggregate points difference from all Pool matches.(c) the Club with the fewest number of players sent off and / or suspended in all Pool matches.(d) toss of a coin.
Teams ranked 1 - 4 will have home advantage. The Quarter-Finals will be:
Team 1 v Team 8; Team 2 v Team 7; Team 3 v Team 6; Team 4 v Team 5