Applicability of the LASPs in the electric-power industry

摘要

There is a unique technique named the Lot Acceptance Sampling Plan (LASP) in the field of statistical quality control. The typical types of the LASP are MIL-STD 105E, Philips and Dodge-Romig. The incoming lots are large in numerous cases in quality control that influence to high costs of quality control with respect to time-inspection, especially if any of high-expensive destructive method of control is needful. Some aspects of a theoretical base relevant for using the LASP in the electric-power industry are elaborated in this paper. Furthermore, calculation of the Average Total Inspection and selection of the statistically valid sampling plans are demonstrated. Two types of errors with LASPs, i.e. type I error when a lot with acceptable quality is rejected and type II error when a lot with unacceptable quality is accepted, are defined.