\section{Current status (merging in master)} The following is implemented/being merged: \begin{itemize} \item Setting completeness of cells \item Communicating completeness over MPI \item Setting Construction level \end{itemize} The following is not yet being merged: \begin{itemize} \item Invalidating completeness on drifting \item Creating and scheduling tasks for grid construction \item Implementation of construction tasks \end{itemize}