Figure 10-28.–Process control chart.
Refer to figure 10-28. For example purposes only,
B+F is 0.12.
the following steps are monitored and plotted on a
control chart below. The steps being monitored are as
follows:
High density (HD) is step 17 and reads 1.20.
Low density (LD) is step 6 and reads 0.60.
Speed point (SP) is step 4 and reads 0.23.
When plotting a control strip, you should always
annotate the date and the time the control strip was
processed. When all points plot within the upper and
lower control limits, the film can be processed. When
any point plots outside the upper control limit (UCL) or
lower control limit (LCL), the process is out of control.
You should notify your supervisor before processing
any material through that particular process.
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