23/08/2017
Life-cycle cost analysis (LCCA) is a tool to determine the most cost-effective option among different competing alternatives to purchase, own, operate, maintain and, finally, dispose of an object or process, when each is equally appropriate to be implemented on technical grounds. For example, for a highway pavement, in addition to the initial construction cost, LCCA takes into account all the user costs, (e.g., reduced capacity at work zones), and agency costs related to future activities, including future periodic maintenance and rehabilitation. All the costs are usually discounted and total to a present-day value known as net present value (NPV). This example can be generalized on any type of material, product, or system.
In order to perform a LCCA scoping is critical – what aspects are to be included and what not? If the scope becomes too large the tool may become impractical to use and of limited ability to help in decision-making and consideration of alternatives; if the scope is too small then the results may be skewed by the choice of factors considered such that the output becomes unreliable or partisan. Usually the LCCA term implies that environmental costs are not included, whereas the similar Whole-Life Costing, or just Life Cycle Analysis (LCA), generally has a broader scope, including environmental costs.
To help building and facility managers make sound decisions, the US Federal Energy Management Program (FEMP) provides guidance and resources on applying LCCA that permits the cost-effectiveness of energy and water efficiency investments to be evaluated (see NIST Handbook 135). This document includes an introduction to LCCA.
Life cycle cost can be conducted in two approaches: deterministic and probabilistic method.
