A 311 supervisor-trainer watches a clerk complete one ticket cleanly and is ready to sign the clerk off as competent. What does sound evaluation require?

A 311 supervisor-trainer who watches a clerk complete one ticket cleanly is not yet ready to sign off; sound evaluation requires multiple observations of that clerk before judging the skill. One success can be luck, an easy call, or heavy coaching that will not exist on the floor. Treating a single clean ticket as enough evidence fails the multiple-observations standard. Accepting verbal assurance that every other ticket would look the same fails performance evidence requirements. Skipping further watching for a satisfaction smile card fails validity: reaction is not competence. Exam caveat: CTT+ requires multiple observations and evaluations of each learner before competence decisions. Operational check: observe the clerk on several varied tickets across the session, score each against the standard, and sign off only when repeated independent performance meets the published ticketing objective. 311 competence decisions affect public service quality; multiple observations across tickets protect residents from a one-lucky-call sign-off that would not hold on the live queue. Document the decision in the session notes so the next municipal offering repeats what worked. Confirm with a quick learner teach-back that the target behavior—not a proxy—is what earned recognition or credit.