Final answer:
The correct answer is option 1) Emergency work requests.
Step-by-step explanation:
In facility management and maintenance, work requests are categorized based on urgency and importance to ensure that the facility continues to operate efficiently and safely. Among the provided options, emergency work requests usually have the top priority on the base facility priority list. Emergency work involves issues that pose immediate threats to health, safety, security, or could cause significant damage or disruption to operations if not addressed promptly.
Routine work requests involve regular maintenance tasks that are planned and scheduled in advance to prevent breakdowns and ensure the facility's longevity. Scheduled work requests also fall under planned activities and generally follow the routine maintenance work requests in priority.
Lastly, unplanned work requests might arise from unexpected issues, but these do not necessarily represent an emergency, so their priority would be determined based on the specific circumstances and impact on facility operations.