Читать книгу Digital Transformation: Evaluating Emerging Technologies - Группа авторов - Страница 75

There are several aspects of cloud projects, such as data privacy and protection, business stability of the provider, pricing structure, legal background, interoperability of the system and solutions, etc., out of which the cost-benefit analysis of the system is the most fundamental one that determines whether a business chooses a commercial cloud or builds an on-premise system. However, research shows that the ultimate decision results from an impact of several other variables, such as the data transfer ratio, storage capacity and requirements, workload factors and licensing policies. Hence, the cost-benefit analysis of any IT project/system is complex and depends on future business processes. Financial calculations always consider the fact that the value of invested money changes over time and that every payment or income is worth more if received immediately rather then after some time in the future. This is presented in the concept of the Net Present Value, which is given as

PV = FV (1 + k) T.

In this expression FV refers to the future value of capital, PV is the present value of capital, T stands for the considered years of investment and k is the price of capital (or the annual interest rate). If certain periodic revenue is expected over several years, T (T = 1, 2, Y), then we can calculate NPV according to

Unlike classical financial models when analyzing IT related investments we have to consider the impact of Moore’s Law [21], which was elaborated upon in detail [16] and is briefly presented in the rest of the chapter. Walker’s model recognizes the fact that a CPU bought today will be two times worse (in terms of performance) than one bought for the same amount of money in two years.