\documentclass{standalone}
\usepackage{tikz,pgfplots}
\usepackage{siltex}
\usetikzlibrary{arrows.meta,positioning}
\pgfplotsset{compat=1.17}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
    xbar=-3mm,
    bar width=4mm,
    xmin=0,
    xmax=21,
    width=85mm,
    height=75mm,
    enlarge y limits=0.15,
    legend style={at={(0.98,0.95)},
        anchor=north east,legend columns=-1},
    xlabel={Days},
    symbolic y coords={Software Development,Development Cycle 2,Development Cycle 1,Test Protocol,Feature Definition,Initial Design,Specifications,Problem Description},
    ytick=data,
]
    \addplot[draw=red,fill=red!40] coordinates {(2,Problem Description) (3,Specifications) (3.5,Initial Design) (13,Feature Definition) (0.5,Test Protocol) (3,Development Cycle 1) (17,Development Cycle 2) (20,Software Development)};
    \addplot[draw=blue,fill=blue!40] coordinates {(2,Problem Description) (3,Specifications) (5,Initial Design) (6,Feature Definition) (1,Test Protocol) (3,Development Cycle 1) (13,Development Cycle 2)};
\legend{Time Spend,Time Planned};
\end{axis}
\end{tikzpicture}
\end{document}