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Я лично голосую за такого вида воронки:

Funnels are linear - this means that a player must complete the funnel steps in the exact order that you have set-up your funnel.

As a simple example, let's say you have a game with distinct numeric levels (i.e, Level 1, Level 2 and Level 3) that are linear (i.e., you must complete Level 2 before completing Level 3 and so on).

If you create a funnel with the following funnel steps:

Step 1 = Level 1
Step 2 = Level 3
Step 3 = Level 2
Step 4 = Level 4

The above funnel will show players in Step 1 and Step 2, however there will be no players in Step 3 and Step 4. What happened? This is because no players have completed the event Level 3, prior to completing the event Level 2. We’ve got Level 2 and Level 3 in the wrong order. A player must be a member of the preceding funnel step in order to fall into the next step of the funnel.