XxFalconxX

Okay bear with me, I work for a company that delivers food. One of my jobs as a manager is to achieve the lowest average delivery time across all orders each week. Before I became the manager, my boss who used to do my job used to be able to achieve an average delivery time of around 40 minutes each week. This was years ago when we did less orders and had less drivers. Once I became the manager most weeks our average delivery times is in the high 40s. Even on our best weeks with very little order issues or order delays I can only get our average delivery time around 43 to 45 minutes. My boss often wants to know why I can’t consistently achieve the low 40s that he was able to achieve in the past. I explain that I believe that the number of issues grow exponential as we add more drivers, more restaurants and more orders. The increased issues mean a higher average time. He disagrees and explains that he believes the issues are relative and even though there are more problematic orders we also have more orders that aren't problematic therefore it should balance itself out. I have never been good at math but his point just doesn't make sense and I believe math can solve our disagreement but I need somebody that is actually good at math to crunch some numbers. Any takers?