What are the two methods of evaluation that are acceptable according to C1077?

The correct option is based on C1077, which outlines acceptable methods for evaluating a testing laboratory. Inspection and accreditation are both crucial components of this evaluation process.

Inspection involves a thorough examination of the laboratory's procedures, personnel, equipment, and quality controls to ensure compliance with established standards. It allows for an assessment of the laboratory's operational effectiveness and adherence to regulatory requirements.

Accreditation, on the other hand, is a formal recognition process whereby an independent body evaluates the laboratory against recognized standards. It serves as a means of ensuring that the laboratory meets specific criteria for competence, reliability, and consistency in its testing practices.

Together, these methods establish a framework that ensures quality and reliability in construction materials testing, particularly for concrete, aligning with the standards set by C1077. The other options do not fulfill the specific criteria outlined in C1077, as they either refer to processes not specified or mix evaluation methods that do not meet the requirements for formal acceptance.