A networked electronic swing-handle fitted with an RFID proximity badge reader satisfies every requirement. Because it is part of an electronic access-control system, it can:
Authenticate individual badge IDs, so each technician uses a unique credential.
Store or forward real-time event data, providing a detailed audit trail of door openings and closings.
Enforce time-of-day schedules in software, automatically denying entry outside approved windows without re-keying or re-programming every lock.
Mechanical pin-tumbler locks and keyed padlocks offer no electronic logging or built-in scheduling, so they fail two of the three requirements. A shared mechanical (or basic electronic) combination lock may allow timed re-locking, but a single shared code prevents per-user accountability and still cannot provide individual audit records. Therefore, the RFID-enabled electronic lock is the only option that meets all criteria.