The objective of this report is to review existing local practices used in establishing and enforcing highway specifications and construction processes and to compare these practices. With procedures based on statistical quality control concepts. In order that statistical quality control concepts may be properly used where applicable, the first part of this report considers the general theory underlying the use of statistical control methods and the development of different types. Of acceptance plans which may be used in the highway construction industry. The second portion of the report is concerned with analyzing and comparing Kentucky's current specification requirements with typical quality control requirements established using basic statistical theory. Specifications used by some other agencies which are based on statistical principles are presented to illustrate the use being made of this type of acceptance plan. Historical data compiled for various contract items used in highway construction in Kentucky are also presented as background information useful for establishing statistically derived specifications in the future.

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No. 295

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The opinions, findings, and conclusions in this report are not necessarily those of the Department of Highways or the Federal Highway Administration.