My name is Michael McKlay and I am having trouble in my Operations Management class. I didn't but the textbook so I'm pretty lost; our current unit is Inventory, specifically, inventory control systems. I'm having trouble with the math; I was never very good at stats. The Prof keeps talking about 2 main inventory control systems, the continuous review (Q) system, and the periodic review (P) system. I missed the class on it and am desperately trying to catch up before the next midterm. I'm looking at exs online and its all greek to me. Can you please describe the difference between the two systems, and how I am supposed to find out the "Reorder Point" (ROP) and "Period of Risk" for both systems?