CUSTOMARY SCHEMES GEOMETRIC APPROACH
fixed algebra, and hence algebra determined by the geometry
engineering behaviour defined use engineering behaviour to in terms of algebra determine algebra
single value used to quantify location in n-dimensional space behaviour classifies behaviour
same for all engineering schemes different engineering schemes have different components
'one size fits all', although methodology that allows engineering- experience can improve quality specific schemes to be developed
allows global comparisons behaviour specific
we know how to make these work does the complexity outweigh the potential benefits?