\psset{fillcolor=white,fillstyle=solid}
\def\Show#1{\psshadowbox{#1}}
\psset{arrows=->}
\begin{psmatrix}
  [mnode=r,ref=t]
   \psframebox[linestyle=none,framesep=.75]{%
    \psset{ref=c}
    \begin{psmatrix}
    [name=A]\Show{Stakeholder}
    \end{psmatrix}
       } &
  [mnode=r,ref=t]
   \psframebox[fillstyle=solid,framesep=.75,fillcolor=gray]{%
  \psset{ref=c}
  \rule{1cm}{0pt}
  \begin{psmatrix}
  [name=B]\Show{Goal} &\Show{Criteria}\\
          \Show{Sub-goal} & \Show{Justification}
          \ncline{1,1}{1,2}
          \ncline{1,1}{2,2}
          \ncline{1,1}{2,1}\tlput{Strategy}
          \ncline{2,1}{2,2}
  \end{psmatrix}
  }
\ncline[angleB=-180]{A}{B}\naput[npos=.7]{Model}
\end{psmatrix}