10 C.F.R. Appendix B to Subpart F of Part 430—Sampling Plan For Enforcement Testing
Title 10 - Energy
Double Sampling Step 1. The first sample size ( Step 2. Compute the mean ( where ( Step 3. Compute the standard deviation ( Step 4. Compute the standard error (SX
Step 5. Compute the upper control limit (UCL1) and lower control limit (LCL1) for the mean of the first sample using the applicable DOE energy or water performance standard (EPS) as the desired mean and a probability level of 95 percent (two-tailed test) as follows: where t is a statistic based on a 95 percent two-tailed probability level and a sample size of Step 6(a). For an Energy Efficiency Standard, compare the mean of the first sample ( (1) If the mean of the first sample is below the lower control limit, then the basic model is in noncompliance and testing is at an end. (Do not go on to any of the steps below.) (2) If the mean of the first sample is equal to or greater than the upper control limit, then the basic model is in compliance and testing is at an end. (Do not go on to any of the steps below.) (3) If the sample mean is equal to or greater than the lower control limit but less than the upper control limit, then no determination of compliance or noncompliance can be made and a second sample size is determined by Step 7(a). Step 6(b). For an Energy or Water Consumption Standard, compare the mean of the first sample ( (1) If the mean of the first sample is above the upper control limit, then the basic model is in noncompliance and testing is at an end. (Do not go on to any of the steps below.) (2) If the mean of the first sample is equal to or less than the lower control limit, then the basic model is in compliance and testing is at an end. (Do not go on to any of the steps below.) (3) If the sample mean is equal to or less than the upper control limit but greater than the lower control limit, then no determination of compliance or noncompliance can be made and a second sample size is determined by Step 7(b). Step 7(a). For an Energy Efficiency Standard, determine the second sample size ( where (1) If the value of (2) If the value of (3) If the value of Step 7(b). For an Energy or Water Consumption Standard, determine the second sample size ( where s1 and t have the values used in Steps 4 and 5, respectively. The term “0.05 EPS” is the difference between the applicable energy or water consumption standard and 105 percent of the standard, where 105 percent of the standard is taken as the upper control limit. This procedure yields a sufficient combined sample size ( (1) If the value of (2) If the value of (3) If the value of Step 8. Compute the combined mean ( Step 9. Compute the standard error (Sx1) of the measured energy or water performance of the Note: Step 10(a). For an Energy Efficiency Standard, compute the lower control limit (LCL2) for the mean of the combined first and second samples using the DOE energy efficiency standard (EES) as the desired mean and a one-tailed probability level of 97.5 percent (equivalent to the two-tailed probability level of 95 percent used in Step 5) as follows: where the t-statistic has the value obtained in Step 5. Step 10(b). For an Energy or Water Consumption Standard, compute the upper control limit (UCL2) for the mean of the combined first and second samples using the DOE energy or water performance standard (EPS) as the desired mean and a one-tailed probability level of 102.5 percent (equivalent to the two-tailed probability level of 95 percent used in Step 5) as follows: where the t-statistic has the value obtained in Step 5. Step 11(a). For an Energy Efficiency Standard, compare the combined sample mean ( (1) If the mean of the combined sample ( (2) If the mean of the combined sample ( Step 11(b). For an Energy or Water Consumption Standard, compare the combined sample mean ( (1) If the mean of the combined sample ( (2) If the mean of the combined sample ( Manufacturer-Option Testing If a determination of non-compliance is made in Steps 6, 7 or 11, the manufacturer may request that additional testing be conducted, in accordance with the following procedures. Step A. The manufacturer requests that an additional number, Step B. Compute the mean energy or water performance, standard error, and lower or upper control limit of the new combined sample in accordance with the procedures prescribed in Steps 8, 9, and 10, above. Step C. Compare the mean performance of the new combined sample to the revised lower or upper control limit to determine one of the following: a.1. For an Energy Efficiency Standard, if the new combined sample mean is equal to or greater than the lower control limit or 95 percent of the applicable energy efficiency standard, whichever is greater, the basic model is in compliance and testing is at an end. a.2. For an Energy or Water Consumption Standard, if the new combined sample mean is equal to or less than the upper control limit or 105 percent of the applicable energy or water consumption standard, whichever is less, the basic model is in compliance and testing is at an end. b.1. For an Energy Efficiency Standard, if the new combined sample mean is less than the lower control limit or 95 percent of the applicable energy efficiency standard, whichever, is greater, and the value of b.2. For an Energy or Water Consumption Standard, if the new combined sample mean is greater than the upper control limit or 105 percent of the applicable energy or water consumption standard, whichever is less, and the value of c. Otherwise, the basic model is determined to be in noncompliance. [63 FR 13321, Mar. 18, 1998]
Title 10: Energy
PART 430—ENERGY CONSERVATION PROGRAM FOR CONSUMER PRODUCTS
Subpart F—Certification and Enforcement
Appendix B to Subpart F of Part 430—Sampling Plan For Enforcement Testing