Enterprise Modeling is the abstract representation, description and definition of the structure, processes, information and resources of an identifiable business, government body, or other large organization. 
Enterprise Modelling (EM) addresses the modelling of business processes, goals, strategy, information entities, business structure, support systems and personnel of an enterprise (Katz, 1990; Fox and Gruninger, 1998).
Enterprise models integrate models of information systems and models of supported business functions and can provide the transparency required for systematic support of enterprise transformation from ‘business to IT’ (Dietz, 2006; Hoogervorst, 2009).
By representing both organisational and technical infrastructure, EM may also provide a broad and comprehensive view of an entire corporation or government agency (Kirikova, 2000), referred to as Enterprise Architecture (EA) (Lankhorst, 2005; Jonkers et al., 2006; Tyler and Cathcart, 2006; Winter and Fischer, 2007; Rohloff, 2008). 
Business Reference Model
- What is Enterprise Modelling? Wikipedia
- Aier, S. and Saat, J. (2011) ‘Understanding processes for model-based enterprise transformation planning’, Int. J. Internet and Enterprise Management, Vol. 7, No. 1, pp.84–103.