This ticket filter accepts or reject every N-th ticket in the Package. The filter opens from menu Package - Reduce - Systematic Selection.
Let's assume the Package contains the following tickets:
01-02-03-04-05-06
01-02-03-04-05-07
01-02-03-04-05-08
01-02-03-04-05-09
01-02-03-04-05-10
01-02-03-04-05-11
01-02-03-04-05-12
01-02-03-04-05-13
01-02-03-04-05-14
01-02-03-04-05-15
Then after filtering with settings Accept every 4th ticket the Package will contains only the following tickets:
01-02-03-04-05-09
01-02-03-04-05-13