\newcommand{\sysReqItem}[6] {
    \item \ #1
    \begin{itemize}[label={}, leftmargin=0pt]
        \item \textbf{Περιγραφή}: #2
        \item \textbf{User Priority (#3/5)}: #4
        \item \textbf{Technical Priority (#5/5)}: #6
    \end{itemize}
    \medskip
}