The financial arrangements of the BOT project are often
the foundation for successful facility. Through the conscientious
mathematical derivation, this paper has proposed
a practicable notion that the FNPV technique
could offer the potential for flexibility beyond its classical
interpretation. In practice, since the parameters in
classical NPV formula such like real net cash inflows
and required rates of returns in each year may vary with
the shifting economy, the real NPV estimated by the
facility financial managers might not be exactly equal to
their former expectations. Therefore, the FNPV will
more fit in with real situation to capture these uncertain
parameters by estimating a possible interval instead of
point estimation. Also, we have emphasized the suitability
of using fuzzy model and pointed out the disadvantages
of using classical NPV method.