National Academies Press: OpenBook

Procedures and Guidelines for Validating Contractor Test Data (2020)

Chapter:Abbreviations and Symbols

« Previous: References
Page 54
Suggested Citation:"Abbreviations and Symbols." National Academies of Sciences, Engineering, and Medicine. 2020. Procedures and Guidelines for Validating Contractor Test Data. Washington, DC: The National Academies Press. doi: 10.17226/25823.

Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

54 Abbreviations AAD Average Absolute Deviation AC Asphalt Binder Content AD Average Deviation ANOVA Analysis of variance AQC Acceptance Quality Characteristics CI Confidence Interval CV Coefficient of Variation CVL Cumulative Validation Lot D2S Difference Two-Sigma IA Independent Assurance LSL Lower Specification Limit OC Operating Characteristic PWL Percent Within Limits USL Upper Specification Limit Symbols Ha Alternative Hypothesis β Buyer’s risk C Factor that is a function of the number of contractor tests µ Mean of the population in the numerical simulation X− Mean of the sample H0 Null Hypothesis NH0 Number of hypothesis test results with a value of 0 in the numerical simulation P Pay Factor Q Quality Index R Range of the contractor tests n Sample size a Significance Level, seller’s risk s Standard deviation of the population in the numerical simulation s Standard deviation of the sample NT Total number of iterations in the numerical simulation Abbreviations and Symbols

Next: Appendices A E »
Procedures and Guidelines for Validating Contractor Test Data Get This Book
MyNAP members save 10% online.
Login or Register to save!
Download Free PDF

In the development of a quality assurance program, a state highway agency (SHA) incorporates policies and procedures for assessing how well the materials and construction used by a contractor on a construction project satisfy the agency's specifications.

The TRB National Cooperative Highway Research Program's NCHRP Research Report 946: Procedures and Guidelines for Validating Contractor Test Data reviews and evaluates the procedures and practices used in the acceptance of construction materials. The report also proposes a related practice for incorporation into AASHTO Standard Specifications for Transportation Materials and Methods of Sampling and Testing.

Supplemental files to the report include Appendices A through E, available as a single PDF file, a State Highway Agency Survey (Appendix A), Survey Responses (Appendix B), Numerical Simulations (Appendix C), State Highway Agency Date Analysis (Appendix D), and Statistical Tables (Appendix E).

  1. ×

    Welcome to OpenBook!

    You're looking at OpenBook,'s online reading room since 1999. Based on feedback from you, our users, we've made some improvements that make it easier than ever to read thousands of publications on our website.

    Do you want to take a quick tour of the OpenBook's features?

    No Thanks Take a Tour »
  2. ×

    Show this book's table of contents, where you can jump to any chapter by name.

    « Back Next »
  3. ×

    ...or use these buttons to go back to the previous chapter or skip to the next one.

    « Back Next »
  4. ×

    Jump up to the previous page or down to the next one. Also, you can type in a page number and press Enter to go directly to that page in the book.

    « Back Next »
  5. ×

    To search the entire text of this book, type in your search term here and press Enter.

    « Back Next »
  6. ×

    Share a link to this book page on your preferred social network or via email.

    « Back Next »
  7. ×

    View our suggested citation for this chapter.

    « Back Next »
  8. ×

    Ready to take your reading offline? Click here to buy this book in print or download it as a free PDF, if available.

    « Back Next »
Stay Connected!