<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">\psset{linearc=.2}
\begin{psmatrix}[rowsep=3pt,colsep=-10pt]
[name=A]\psframebox{requirements}\\
&amp;[name=B]\psframebox{design}\\
&amp;&amp;[name=C]\psframebox{coding}\\
&amp;&amp;&amp;[name=D]\psframebox{testing}\\
&amp;&amp;&amp;&amp;[name=E]\psframebox{operations}
\psset{linearc=0,arrows=-&gt;,armA=0pt,angleB=90}
\ncangle{A}{B}
\ncangle{B}{C}
\ncangle{C}{D}
\ncangle{D}{E}
\psset{angleB=-90,angleA=180}
\ncangle{B}{A}
\ncangle{C}{B}
\ncangle{D}{C}
\ncangle{E}{D}
\end{psmatrix}
</pre></body></html>