Create Doc Reference for pipeline quota minutes are calculated

Problem to solve

I am unable to find any doc reference on how we calculate pipeline minutes which are charged to a group's pipeline quota.

The doc for how pipeline duration is calculated explains how pipeline duration is calculated. But it doesn’t mention how cost is calculated.

Further details

In this doc, the example results in a total pipeline minutes use of 4 minutes. However, the amount the user would be charged for in their group's pipeline quota is 8. See below ...

How pipeline duration is calculated

A simple example is:

A (1, 3) B (2, 4) C (6, 7) In the example:

A begins at 1 and ends at 3. B begins at 2 and ends at 4. C begins at 6 and ends at 7. Visually, it can be viewed as:

0  1  2  3  4  5  6  7
   AAAAAAA
      BBBBBBB
                  CCCC

The union of A, B, and C is (1, 4) and (6, 7). Therefore, the total running time is:

(4 - 1) + (7 - 6) => 4

How we charge for pipeline minutes in the group's pipeline quota

The sum of each individual job is being calculated.

A + B + C = 3 + 3 + 2 => 8

Proposal

Add a section to this doc which explains how the pipeline quota minutes are calculated.