Condition assessed

Rule #1

When a point falls outside UCLx, denoted as 11s.

Rule #2

At least 2 points out of 3 are in zone A.

Rule #3

3 out of five consecutive points on a control chart fall above XB.

Rule #4

8 consecutive points above XB (in Zones B, or A or beyond).

Rule #5

6 consecutive points decreasing or increasing. In this case only a decreasing scenario was used.