For purposes of the TxDOT bridge inspection QC/QA Program, the word quality is used and defined in terms of measurable variations from established procedures, practices, and requirements that are in accordance with National Bridge Inspection Standards (NBIS) as well as additional TxDOT requirements. The additional TxDOT requirements can be found in Chapter 3 of this manual, “Qualifications and Responsibilities of Bridge Inspection Personnel” and the current bridge contracts.

The Federal Highway Administration (FHWA) monitors 23 metrics for evaluating the performance of a State’s BIP. These 23 metrics address components of and define different levels of compliance with the NBIS.

TxDOT is committed to attaining a quality assessment that measures no less than a level of compliance with all 23 NBIS metrics and TxDOT requirements, and to continuously pursue more effective measures leading to the compliance of such standards and requirements. Additionally, TxDOT will continuously strive toward implementing effective and comprehensive measures that enhance the overall quality and consistency of the BIP.

CFR Title 23, Part 650, Subpart C - NBIS, Section 650.305, defines Quality Control (QC) as “Procedures that are intended to maintain the quality of a bridge inspection and load rating at or above a specified level.” These procedures will be implemented on an on-going basis for issues related to program organization and within specific time frames for review task related issues.

CFR Title 23, Part 650, Subpart C – NBIS, Section 650.305, defines Quality Assurance (QA) as, “The use of sampling and other measures to assure the adequacy of quality control procedures in order to verify or measure the quality level of the entire bridge inspection and load rating program.” These procedures have the effect of identifying needed changes to policy, guidelines, etc. and permitting for continual improvements to QC protocol thus allowing for a more efficient and effective BIP.