Abstract Model (glossary)
(1) A simplified description, especially a mathematical one, of a system or process, to assist calculations and predictions. (Pearsall 2012)
(2) An abstract or conceptual representation of a system that does not have a physical or concrete existence. (Created for SEBoK)
(1) Pearsall, Judy (editor). 2012. Oxford Dictionaries Online. Oxford, England, UK: Oxford University Press. Available at : http://oxforddictionaries.com/definition/english/model.
(2) This definition was developed for the SEBoK v. 1.0.
An abstract model contrasts with a concrete physical model. It can be further classified as descriptive or analytical (See article Types of Models).