  Black hole transients are known to undergo spectral transitions that form
q-shaped tracks on a hardness intensity diagram. In this work, we use archival
RXTE data to extract a characteristic minimal timescale for the spectral states
in GX 339-4 for the 2002-3, and 2010 outbursts. We use the extracted timescale
to construct an intensity variability diagram for each outburst. This new
diagram is comparable to the traditional hardness intensity diagram and offers
the potential for probing the underlying dynamics associated with the evolution
of the relevant emission regions in black hole transients. We confirm this
possibility by connecting the minimal timescale with the inner disk radius,
$R_{in}$ (estimated from spectral fits), and demonstrate a positive correlation
between these variables as the system evolves through its spectral transitions.
Furthermore, we probe the relation between the minimal timescale and the break
frequencies extracted from the power spectral densities. Lastly, we examine a
possible link between the extracted timescale and a traditional measure of
variability i.e., the root mean square, determined directly from the power
spectra.
