Despite suchachievements, most of the measures were developed in forms of
simplified and generic indexes. Many existing approaches were
restricted in their scope on either tangible (i.e. IBS and IBIA) or
intangible (i.e. reframing and QFSD) aspects of IB [109]. Some
indexes (i.e. IBI) were criticised for ‘non-determinism of criteria;
non-sequitur calculation method; non-uniqueness of calculation
results; and non-organizational judgment of assessment procedure’
[29]. Apart from these drawbacks, existing studies lack an
exhaustive investigation of the system intelligence of the intelligent
systems and components in the intelligent building. There is also a
dearth of integrated systematic methodology and techniqueswhich
facilitates the appraisal of the system intelligence of specific
intelligent building systems and components.