What is the reason that the speakers discuss the end of the month?

Listen to a conversation between a student (S) and the supervisor of employees (E) at the university library. The student is a part-time employee at the library.
E: Hi, Melissa! How was your economics exam?
S: It was actually pretty challenging. Thanks for letting me take time off from here to study for it.
E: Well, like we said, when we hired you, your schoolwork is always a priority as long as you give us sufficient notice as to when you need off. When you were out though, we had a staff meeting explaining a couple of things. We’ll be dividing work in a new way, and we’ll also be using a new procedure for employees to keep track of what work they do.
S: You mean instead of keeping track of how many hours we work per week?
E: No, you’ll still need to keep track of your total hours, so you can get paid each week. The new procedure I’m talking about will be extra.
S: And you said the work will be divided differently?
E: Yes. You work at the circulation desk, right?
S: Right.
E: So, right now you check out books for students, log the returned books, and sort them by category so the stock team can put them back on the shelves. Anything else?
S: No, that’s about it.
E: Ok. Well, we’re expanding that job to have you do some other tasks too, so going forward you will also help students locate books on the shelves and put returned books in their proper places on the shelves.
S: Oh, that’ll be good. There are times when I sit at the desk just waiting for students to come by to check out or return books.
E: Ok, and now for the tracking procedure. We’re asking employees to keep track of the specific tasks they do and for how long. For example, when you’re at the circulation desk, how much time do you spend checking in returned books and separating them, or how much time do you spend checking out books for students to borrow?
S: Wow, and this seems very specific. I’m just wondering why do we have to be so detailed?
E: Well, the university wants a written job description for each role, so we’re putting together a summary of student jobs at the library with specific details about each job, what specific tasks it entails and how much of the job is spent on each task. It won’t be as complicated as it sounds. You’ll have a piece of paper listing all the tasks you do, and you’ll just need to write on it how many minutes you spend on each task. You’ll submit it with your weekly timesheet.
S: I also wanted to ask for a few days off again. I have a project due for my world history class at the end of the month.
E: That’s fine. Please email me the details. For now, go meet with Ms. Stanton in the reference section. She’ll show you how to help students who are looking for specific books.