What would you do?

Scenario One

Tom, one of your employees, has worked in the office for ten years. He is well liked and knowledgeable about the history of the office and University systems. There is no past history of performance issues that you can see from looking at past performance reviews. What you have observed is that Tom regularly shows up late, (office opens at 8:30am, Tom usually comes by 9/9:15am), takes longer than an hour for lunch, and often is heading out the door by 4:30pm (office closes at 5pm). You notice that this type of behavior seems to happen once in a while for other employees in the office, but seems like a daily practice for Tom. He never records any of this time on his time card as official time off.
Take a few moments to think about the situation and make some notes. What would you do? What would be your first step?

Potential Responses

1. Do nothing; every one seems to be relatively happy and no one has complained to you about this issue. 
2. Address the issue with the office as a whole at a meeting, reminding everyone of operating hours and the importance of being on time.
3. Address the issue directly with Tom, explaining your concerns, exploring his understanding of working hours, and being clear about your future expectations.
4. Give Tom a verbal warning for his lack of timeliness, and tell him if it happens again, he will receive a written warning that will go into his permanent discipline record.