The following example uses roman numbering:
\begin{enumerate}[(i)]
\item The user specifies bounds on each configurable parameter: $f, r$, and
$su$. This corresponds to the maximum and minimum value the user is
willing to tolerate for a parameter.
\item The AppLeS searches the parameter space for feasible
triples; each triple corresponds to a feasible configuration of the
tunable application. If no configurations can be found, the user
will need to adjust the request.
\item The user considers all configurations and then selects a single
triple for execution.
\item The AppLeS will determine an appropriate work allocation for
the user-selected triple and then execute.
\end{enumerate}
produced: