The process for the production of an electrical device is suitable for inspection by variables. Production is inspected in lots of 150, at inspection level II, normal inspection with AQL = 2.5%.
The maximum temperature of operation for the device is specified as 50 °C.
(a) Use TABLES 4 and 5 to find the sample code letter, the sample size and the acceptability constant.
(b) A sample is taken and the temperature measurements are as follows: 43 °C, 49 °C, 46 °C, 39 °C, 44 °C, 45 °C, 40 °C, 48 °C, 46 °C and 41 °C.
Determine whether the lot should be accepted.