\section{Questions and remarks of the second reviewer}
\begin{enumerate}
-\item Move the contributions from related work to introduction
+\item Move the contributions from related work to introduction.
+
+\textbf{Answer:} The contributions were moved to the introduction section.
\item Why emphasize it is a grid platform? the presentation of related work follows the logic of heterogeneous CPUs. Grid is only a type of platform with heterogeneous CPUs.
\item Why $T_{old}$ is computed using eq. 12, which applies MAX over computation time and communication time, while in $T_{new}$, max and min operations are applied over computation and communication separately?
-\textcolor{blue}{Answer: We agree with the reviewer, $T_{old}$ is the maximum execution time of the application before scaling the frequency and it is computed as in $T_{new}$ equation without scaling factors. So, we have changed the $T_{old}$ in the paper as as follows:
+\textbf{Answer:} Both forms can be used for computing $T_{old}$ and $T_{new}$. To avoid this confusion, the same form was used for both equations in the paper.
+
\begin{equation}
\label{eq:told}
T_{old} = \mathop{\max_{i=1,2,\dots,N}}_{j=1,2,\dots,M_i} (\Tcp[ij]) +
- \mathop{\min_{i=1,2,\dots,N}} (\Tcm[hj] )
+ \mathop{\min_{j=1,2,\dots,M_h}} (\Tcm[hj] )
\end{equation}
-}
+where $h$ is the index of the slowest cluster.
+
+
\item Line 55 on page 16 is to define the slack time, which should be introduced at the beginning of the paper, such as in figure 1.
