Likewise, it would not make sense to have an installer take the exams for transportation systems because the knowledge in that category does not relate to most installers' jobs. SCTE does not claim that its certification programs provide all the verification necessary for a particular job classification. Field verifications by knowledgeable personnel are the best way to be sure that an individual can perform to the level required on the job. Field testing Designing appropriate field-testing can involve a couple of aspects. Both have benefits.
Field testing in a controlled environment tends to make verification less subjective.
All candidates are exposed to the same sets of circumstances so that the exams are consistent and nondiscriminatory. However, a formal environment can set some candidates at ease while creating distress for others, and such checks still don't confirm that the individual will perform the tasks correctly on the job. Field verifications on the job can be done either during task performance or after job completion. Again, both methods have value. Checking work after completion improves anonymity, decreases subjectivity and indicates how well the individual performs without supervision.