The difference is number of FTE supervised. In the model, the medium-sized library has two Access Services Manager Is, both of whom manage a smaller number of FTE than an Access Services Manager II. The ASM II could potentially manage twice as many FTE because this is a more advanced management position. Please remember that the sample staffing model org charts we provided are intended to be examples, and not a definitive staffing models for every library in our system. It's possible a medium-sized library could have 2 ASM Is, or they could have an ASM II, depending on number of direct reports, positions available, or other variables.