Hilaria was the manager of the student success center in the College of Business at a metropolitan university. There were specific times each year when his advising staff was overwhelmed with students needing degree checks and advice on next semester's classes. Even working weekends would not permit all students wanting an appointment to obtain one. Which OM skill could Hilaria draw upon to help with this issue?

a$.$ Quality

b$.$ Scheduling and capacity

c$.$ Planning and budgeting

d$.$ Inventory management