Homework Ten.

The SPC charts for Head 18 are:

The head is beyond the control limits early in the session, between 12:18 and 12:34 a.m.

The SPC charts for Head 14 are:

The charts for Head 23 are:

When the new shift comes in at midnight, filler heads are out-of-control for about the first twenty minutes. Presumably the new shift take that amount of time to readjust the machinery to fit their own working methods.