The article describes how the study of the sources of variability in quality, through statistical methods such as variance analysis, can lead to the solution of complex quality problems. The analysis of variance method consists of classifying and corss-classifying statistical results and also testing whether the means of the classifications differ significantly. The details are described of a particular study at a hot mix asphalt facility. It is shown how it was necessary to be sure that the test portion must be large in relation to the largest piece of aggregate if reliable estimates of the amount of asphalt cement put into the mix are to be made.

  • Corporate Authors:

    National Asphalt Pavement Association (NAPA)

    5100 Forbes Boulevard
    Lanham, Maryland  United States  20706
  • Authors:
    • Davis, R L
  • Publication Date: 1989

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00486739
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 31 1989 12:00AM