Two step interview process. Regular Interview then observation day

I was asked numerous questions on workplace ethics, other co-workers, team efforts, past experience, etc. I also had to come in and take an aptitude test online with the company. Waiting for results on that, so the process can begin for me to take a drug test and whatever else that may be needed. So far the interview process is what I expected and the manager is very professional in his interviewing and the step-by-step process..directing me along the way as to what I can expect from the company and what they expect in return from their employees. Sounds like it could take about 2 weeks for the entire process to be done, but he has noted that there have been times when it has taken longer. I am eagerly awaiting the next step, as this sounds like a great opportunity for me, by means of advancing my career and learning more about the company as I go.