  This article illustrates the possibility of investigating mass hierarchy and
CP-violating phase \delta^{CP}, in the context of CP trajectory diagrams in the
bi-probability plane. Separation between normal mass hierarchy (NH) and
inverted mass hierarchy (IH) CP trajectory ellipses in the P-P^T plane seems to
be very promising in order to investigate mass hierarchy. Illustration of
separation between two hierarchy ellipses in the E-L plane is very helping to
cover all the desired base lines and beam energies and also to analyze benefits
and drawbacks at single place. If we know the mass hierarchy, then from the
large sizes of CP trajectory ellipse which is possible at appropriately long
base line (L) and at specific value of beam energy (E), it becomes possible to
investigate at-least narrow ranges of CP/T-violating phase \delta^{CP}. The
Possibility of more than one set of (\theta_{13}; \delta^{CP}) parameters to
correspond to any chosen coordinate in P-P^T plane, known as parameter
degeneracy, may hinder exact determination of mass hierarchy as well as
\delta^{CP} value. To circumvent this degeneracy in the (\theta_{13};
\delta^{CP}) parameter space, in case of opposite sign solutions corresponding
to NH and IH case points toward the need of sufficiently long base lines, so as
to separate opposite hierarchy ellipses to observable separation, and in case
of same sign solutions corresponding to either NH or IH, we need to choose an
experimental configuration with L = 2,535 Km, E = 5 GeV for n=1 scenario.
