THE ECONOMIC FEASIBILITY OF THE APPLICATION OF STATISTICAL CONCEPTS AND METHODS TO THE CONTROL AND ACCEPTANCE OF HIGHWAY MATERIALS AND CONSTRUCTION

STATISTICAL QUALITY CONTROL IS NOT GENERALLY PRACTICED IN THE HIGHWAY INDUSTRY; THE PROBABLE COSTS OF SUCH A SYSTEM WERE ESTIMATED BY PROJECTION OF CURRENT COSTS OF CONTRACTORS AND PRODUCERS WHO ARE CURRENTLY MAINTAINING VOLUNTARY TESTING PROGRAMS. ESTIMATES BASED ON DATA OBTAINED FROM 49 CONCERNS IN 15 STATES INDICATE THAT THE COST OF AN ACCEPTABLE DEGREE OF QUALITY CONTROL OF HIGHWAY MATERIALS OR CONSTRUCTION BY THE CONTRACTOR OR PRODUCER WOULD AVERAGE ABOUT FOUR PERCENT OF CONTRACT PRICE. AVAILABLE INFORMATION INDICATES THAT THE CURRENT TOTAL ENGINEERING EXPENDITURES BY STATE AGENCIES ON FEDERAL AID PROJECTS IS IN THE ORDER OF 10 PERCENT OF CONTRACT PRICE. COMPARISONS OF RELATIVE COSTS BASED ON THESE NUMBERS AND ON DIFFERENT PROPORTIONS OF QUALITY CONTROL EFFORT SHARED BY THE CONTRACTOR AND THE STATE AGENCY INDICATE THAT THE OPTIMUM QUALITY ASSURANCE SYSTEM WOULD BE QUALITY CONTROL BY THE CONTRACTOR WITH ACCEPTANCE TESTING BY THE STATE AGENCY. THE DOLLAR COST OF SUCH A SYSTEM IS ESTIMATED TO BE ABOUT 20 PERCENT LESS THAN THAT OF CURRENT PROCEDURES. A RELATED ACTIVITY WAS A STUDY OF THE RELATIVE SIZE OF BUYER'S AND SELLER'S RISKS USING CURRENT ACCEPTANCE PROCEDURES AS COMPARED TO THOSE WHICH WOULD BE ASSOCIATED WITH A SYSTEM OF COORDINATED QUALITY CONTROL, REVISED SPECIFICATIONS, AND STATISTICAL SAMPLING PLANS. THIS STUDY INDICATED THAT THE LOWEST RISKS FOR THE SAME LEVEL OF TESTING EFFORT WOULD BE REALIZED WHEN A STATE OF STATISTICAL CONTROL OF PRODUCTION AND CONSTRUCTION PROCESSES WAS OBTAINED. /FHWA/

  • Corporate Authors:

    Materials Research & Development Inc

    ,    

    California Division of Highways

    Bridge Department
    Sacramento, CA  USA  05914

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00214511
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Files: TRIS, USDOT
  • Created Date: Mar 7 1971 12:00AM