There is a huge difference in the replacement cost of the grinder pumps, which can have a $2,000.00 to $3,000.00 retail price depending upon installation and labor. The replacement cost of a sewage pump could be in the $400.00 to $600.00 price range depending upon installation and labor.
Universal Systems Model. The Universal Systems Model is a model that is used to evaluate systems. All technological systems can be described with the Universal Systems Model, and the five elements that define this model are: Goals, Inputs, Processes, Outputs, and Feedback. The goal is what you want to accomplish.
An open system is one in which there is an exchange of matter, energy, and information with the environment; in a closed system there is no such exchange. A living system cannot survive without this exchange, but in order to survive it must maintain pattern and organization in the midst of constant change.