Rachel remembers that she has an important meeting with her advisor right after her english class on tuesday. this is an example of memory.

This is an example of Prospective memory.
Prospective memory is a type of memory that includes making sure to play out an arranged activity or review an arranged goal at some future point in time. This type of memory undertakings are basic in every day life and range from the generally easy to outrageous crucial situations.we can also say that Prospective memory is another method for portraying our capacity to accomplish something later on.

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.