Process:  - The carafe is filled with water - The water is poured into the machine at the back - Coffee beans are put into a grinder - The grinder is activated - A filter is put into the coffee maker - The ground coffee is put into the filter - Sometimes a bit of salt is added to the grounds to bring out flavor - The top of the machine is closed - The power is turned on - The water passes through the grounds and becomes coffee.  Perturbation hypothesis: suppose beans are more expensive happens, how will it affect MORE coffee being made.  Does the supposed perturbation have an effect (direct or indirect) on the process?

yes