\newcommand{\sysReqItem}[7] {
    \item #1 \ #2
    \begin{itemize}[label={}, leftmargin=0pt]
        \item \textbf{Περιγραφή}: #3
        \item \textbf{User Priority (#4/5)}: #5
        \item \textbf{Technical Priority (#6/5)}: #7
    \end{itemize}
    \medskip
}