(2)
The sensistrip must then be read and plotted to determine gamma.
(3)
The gamma value is then plotted on the process control chart in relation to an average
gamma value established as being acceptable.
(4)
The gamma value plotted on the process control chart will then be evaluated in relation
to previous plots to determine if replenishment of the solution has been correct.
(5)
Solution strength is then determined to be either correct, too strong, or too weak and, if
necessary, a correction is made.
EXERCISE
5.
The factor plotted on a process control chart to monitor solution replenishment is
____ _ _ _ _ _ _ _ _ _ _ _ _ _.
3-5.
THE PROCESS CONTROL CHARTS - HOW THEY ARE USED.
a. At this point you must learn how to evaluate a group of plots on the control chart, and
determine what to do with your evaluation. Figure 25 is an illustration of a process control chart
showing variations over a 31-day period.
Figure 25
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