McDonaldization, as I interpret it, seems to be, at the root, a measure of control through a specific division of labour in efforts to minimize costs and maximize profits. Of course it goes beyond just that but we will start here for now. Ritzer illustrates this point effectively through his four properties of social organization, efficiency, calculability, predictability, and control.
Efficiency is "choosing the optimum means to a given end". Basically getting things done as fast as possible. I am sure we would all like to be more efficient at our respective jobs, and left to our own devices, we would all strive to achieve efficiency. The difference in the McDonalized society we live in, this efficiency is imposed upon you, and your own methods are obsolete. This does not just apply to just McDonalds, it is in everything, it is what we have learned our entire lives, and it teaches us to simply except what institutions tell us is most efficient. Now let's look at the irrationality of this rationality. Ritzer uses an example of a salad bar. When you go to a salad bar you have already accepted that it is more efficient for you to go get the salad yourself, in reality you have just bought an empty plate, and you are doing the work to fill it, this is not more efficient for you, it is more efficient for them and you're paying for it. He also uses the ATM as an example, essentially we are paying the bank money so we can be bank tellers, and it's crazy