§ 56.11 – How do I determine if I must revise my template sampling plan after I have made major changes to my service?

(a)    Enter your sample from the current report year into the companion template as if you were going to develop a new template sampling plan. 

(1)   Enter your PPMT data if your current template sampling plan follows the PPMT option.

(2)   Enter the corresponding grouping data if your current template sampling plan follows the grouping option.

(b)   For period-based sampling, go to the PeriodPrecision Worksheet.  The index number you need depends on the efficiency option you have chosen for the current template sampling plan.  For example, you must use the value in cell D6 of Part A, Figure 56.01 (=32.7) if your template sampling plan is based on the APTL option with service grouping and if you have chosen to use your 100% UPT count by group in developing your annual estimates.

(c)    For interval-based sampling, go to the IntervalPrecision Worksheet.  The index number you need also depends on the efficiency option you have chosen for your current template sampling plan.  For example, you must use the value in cell C5 of Part B, Figure 56.01 (=31.3) if your template sampling plan is based on the APTL option.

(d)   You must revise your sampling plan if the precision index is smaller than 10.0.

A. PeriodPrecision Worksheet

B. IntervalPrecision Worksheet

Figure 56.01.  Layout of the PeriodPrecision and IntervalPrecision Worksheets