Assessment where the work happens
Most competencies come down to watching someone do the work. In Compassly the Supervisor reads a short briefing, so they know exactly what is required and every assessor assesses consistently, then records each step as it happens, in whatever order the work unfolds, using your organisation's own scale such as pass, minor and fail. If they are called away, they can come back to it later or a colleague can pick it up, so the assessment fits around the shift, and every answer is recorded against who gave it and when.
The person being assessed can read everything they will be assessed against beforehand, so they arrive prepared. Afterwards, a debrief gives them feedback to read before their next attempt, and the full report of every completed assessment stays available to them in My Profile.