The negative effectsof the overall complexity of business and IT in the enterprise, manifest themselves asunreliability and excessive cost of operations, and excessive cost and time tomake changes. Business complexity has additional negative effects due to the difficulties in selling more complex products and customer dissatisfaction due to unclear and time consuming business processes. Therefore complexity of the business and IT in enterprise needs to be controlled and managed. To be able tocontrol and manage the complexity, we need to be able to measure it. If looking into different treatments of the complexity of systems, we can define the complexity as the number of different elementsand their interconnectedness (number of interconnections between theseelements). Based on such definition, we propose tomeasure business and IT complexity by counting the elements of business(like business models, customer segments, offered products, business functions, business services, business processes, etc.) and IT (like data stores, applications, technologies, etc.), and their interconnections. In both business andIT we can differentiate between:
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