“…Worth to be notice that DoI, describes the calculation methodology for FCI in its institutional documents, though for the actual computation, it refers to the use of Figure 7. Classification of references by type of FCI described and provenance (Rush, 1991;Kaiser, 1993;Fagan & Kirkwood, 1997;AAPPA, 2000;Vanier, 2000;Ho, E. H. W. Chan, Wong, & M. Chan, 2000;Teicholz & Edgar, 2001;Brooks, 2004;Uzarski & Grussing, 2008;IFMA, 2008;Roberts, 2009;Lavy et al, 2010Lavy et al, , 2014bBello & Loftness, 2010;Attalla, MacDonald, & Dunn, 2012;Lavy, 2013;Karanja & Mayo, 2016;Dejaco et al, 2017) Complex Differs from the previous for the calculation methodology of deferred maintenance and current replacement value (Capital Asset Management -Asset Strategies, 2011;Geldermann & Sapp, 2007;Kaiser, 2009;Maltese et al, 2017;Quirk, 2006;Rashedi & Hegazy, 2016;Selman & Schneider, 2004) Combined Indicators derived from the basic or extended version of FCI, combined with other metrics (Federal Facilities Council, 2001;Mills, 2001;NASA, 2003;Selman, 2003 Since the definition of its first version in Eq. (1), the indicator had been revised and other versions have been proposed.…”