2.3 Performance Checklists and the Six Demonstrations

The Checklist Is the Performance Standard

The performance examination is built around required steps. ACI's current program page describes the format as actual demonstration of six required test methods and practices plus a verbal description of C172/C172M sampling. ACI policy states that performance is evaluated based on the criteria of the performance examination checklist.

The checklist idea matters because performance grading is not based on whether the candidate looks experienced. The supplemental examiner observes the trial and marks steps pass or fail. ACI policy states that incorrect performance or omission of one or more checklist steps constitutes failure of that trial. Small steps count.

The six current demonstrations are tied to C1064/C1064M temperature, C143/C143M slump, C138/C138M density, C231/C231M pressure air, C173/C173M volumetric air, and C31/C31M field specimens. C172/C172M sampling must be verbally described under the current program page, with local session instructions controlling whether the sponsoring group requires more.

Practice should begin before fresh concrete is present. Dry runs help candidates learn equipment layout, hand position, sequence language, and where mistakes tend to happen. Wet practice is still needed because real concrete changes timing, cleanup, consolidation feel, surface finishing, and reading behavior.

A common fail point is starting in the middle. Candidates remember the dramatic part of a method and skip setup, equipment checks, dampening, sample handling, or final recording. A better practice pattern is start-to-finish every time. Say the method name, prepare the station, perform the whole sequence, record the result, and reset.

Another fail point is relying on workplace shortcuts. A jobsite routine may be accepted locally for speed, but the performance exam follows required checklist steps. If your work habit differs from the current standard or the JTA, practice the exam version until it is natural.

Candidates should also prepare for silence. The examiner may not stop a trial when an error is made. You may complete the trial and only then learn the result. That makes self-monitoring important. Build internal checkpoints into the method so you can catch missing actions before moving on.

A strong checklist practice session ends with review. Ask what step was almost skipped, what equipment item caused hesitation, what timing felt rushed, and what result-recording line was unclear. The goal is not merely to complete a trial once. The goal is to make complete, correct performance repeatable under exam pressure.