One of the most important things you can do in an interview is arriving on time. It makes a great first impression. If you are late even for a few minutes, it leaves a poor impression and can cost you the job. It makes the interviewer question your judgement and how you will handle clients, other employees and if you will be a team player.
Being on time means arriving 5-10 minutes before the interview start time. If you get there too early, wait in until 10 minutes to the interview to walk in to the reception. Arriving too early can create an awkward situation for the interviewer. It is especially difficult for a coordinator if you are interviewing with multiple schedules because each of them may need to rearrange their calendars. It may also create a conflict for an interviewer who may be scheduled for multiple interviews.
The most important thing to remember if you decide to arrive more than 15 minutes early is to be prepared to wait and make sure to let the receptionist know that you are willing to wait. It shows that you are considerate of the schedule and takes of the burden for others who try to scramble to get you taken care of. It may be worth avoiding creating a stressful situation for your interviewer. It may not leave them with a very good impression of you. It is also important to research the company culture and find out if they are very formal or casual because this may help you know if they are able to make changes quickly with no red tape.