Knowing in detail the management flow for passengers
with reduced mobility assistance, in order to proceed with the
analysis of the process is necessary to extrapolate the
functional requirements (FRs) for each functional area and the
design parameters (DPs).
Functional requirements must be deducted from the
knowledge of the process in object and through a careful
translation of the passengers needs with reduced mobility. All
information obtained must be analyzed first through the
Independence Axiom and then with the Information Axiom.
According to the Independence Axiom the best design is an
uncoupled one: in literature could be found some measures to
establish the degree of coupling of a system [12].
The design parameters will be the means by which it will
be possible to meet the process actions identified by the
functional requirements, while remaining within the
boundaries defined by the constraints.
Relations between the functional requirements and the
design parameters characterize the Design Matrix. The Design
Matrix is used to evaluate the interactions between rows and
columns for each phase of the process.
Thus the FR’s and the DP’s can be interpreted as two
vectors, while the mapping instructions are given by the
Design Matrix.