Alternatives To the Use of Contractor's Quality Control Data For Acceptance and Payment Purposes

Currently, several state Departments of Transportation (DOTs) are using contractor test results, in conjunction with verification test results, for construction and materials acceptance purposes. While the reasons for using contractor test results for construction and materials acceptance purposes are real (essentially shortage of state DOT staff and intensive construction schedules), the practice itself has fundamental pitfalls. This research reveals the conceptual and technical pitfalls of using contractor test results for acceptance and payment purposes; identifies and ranks potential alternatives and improvements to the use of contractor test results for acceptance and payment purposes; and investigates the potential application of skip-lot sampling as a means for reducing acceptance sampling and testing for highway agencies.