oh man, this dude doesn't know how to teach!! yes, he is a nice old man but he was so dissappointing as a professor. I was able to tell on the first day of class he wasn't around school for a very very long time. I once showed up for his class 5 minutes late in the middle of the semester, and i was able to count 5 students in the classroom. As someone else mentioned, he specifically said "counting is not my specialty." Although reading off the textbook, he repeatedly made simple counting errors so many times. For our first miderm, he couldn't open the entrance door to the exam site that everyone started the 70minute exam 30 minutes late. Also, so many people were able to cheat during tests.
Basically, professor Heyman wasn't prepared to teach this course. He is very out of touch with today's students and i wasn't really sure if he knew what he was teaching either. Don't get me wrong but this is not personal. He seems like a very nice man but not the professor you would want as a professor. I was so pissed at one point that I was going to petition the IEOR department for giving us such a horrible professor. This course probably has the lowest course number in the IEOR department, but SIEO 3600 is a pre-requisite course for almost all the other IEOR courses and the department shouldn't have ever try to experiment us with professor Heyman.