Green IT in Banking Systems Impacted by Prudential Rules - Erlang Models for Forecasting Computer Performance

摘要

This paper surveys the contributions and applications of queueing theory in the field of banking datanetworks. We start by highlighting the history of IT and banks and we continue by providing informationregarding the main prudential regulations on the banking area as Basel Accords and green IT regulations,that on one side generate more computing needs and on the other side promote conscientious use of theexisting IT systems.Continuing with a background of the network technologies used in Economics, the focus will be on thequeueing theory, describing and giving an overview of the most important queueing models used ineconomical informatics. While the queueing theory is characterized by its practical, intuitive and subtleattributes, the queueing models are described by a set of 3 factors: an input process, a service process anda physical configuration of the queue or the queueing discipline.The Erlang B and C mathematical definitions of formulas for a specific number of s servers, at the λ arrivalrate, and the τ average service time will be described, used and confirmed by computer simulations ofreal queues usually found in the banking computing systems.The goal is to provide sufficient information to computer performance analysts who are interested in usingthe queueing theory to model a network of banking computer systems using the right simulation modelapplied in real-life scenarios, e.g. overcoming the negative impacts of the European banking regulationswhile moving towards green computing.