I am trying to draw the following picture in tikz by myself because I need other labels. Is there a smart way of drawing?

Thanks for your answers. :)
I am trying to draw the following picture in tikz by myself because I need other labels. Is there a smart way of drawing?

Thanks for your answers. :)
Thanks to the comment of BambOo, I was able to do it myself. At first the code. It is just slighly a difference of the link above.
\documentclass[12pt,oneside,english,reqno,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{tikz}
\usetikzlibrary{shapes}
\usetikzlibrary{chains,positioning,shapes.symbols,fadings,shadows, backgrounds}
\usetikzlibrary{decorations.pathmorphing}
\usetikzlibrary{shapes.callouts}
\usetikzlibrary{shapes.arrows, shadings}
\usetikzlibrary{decorations.text}
\usepackage{varwidth}
\newcommand\Umbruch[2][3cm]{\begin{varwidth}{#1}\centering#2\end{varwidth}}
\begin{document}
\begin{tikzpicture}[]
\tikzset{
arrow/.style={
draw,
minimum height=1.5cm,
minimum width=1cm,
inner sep=2pt,
shape=signal,
signal from=west,
signal to=east,
signal pointer angle=110,
top color=blue!80!green!90!,
bottom color=blue!30,
% fill=blue!50,
drop shadow,
}
}
\begin{scope}[start chain=going right,node distance=3pt,]
\foreach \mois / \Smois in {Railroad blocking , Train scheduling , Locomotive assignment , Crew pairing , Crew rostering }
\node[name=\mois, arrow,on chain, xscale=.92] {\Umbruch{\small{\Smois}}};
\end{scope}
\end{tikzpicture}
\end{document}
The small variation of OP answer (+1):
\documentclass[12pt,oneside,english,reqno,a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage{tikz}
\usetikzlibrary{chains,
positioning,
shadows, shapes.symbols}
%---------------- show page layout. don't use in a real document!
\usepackage{showframe}
\renewcommand\ShowFrameLinethickness{0.15pt}
\renewcommand*\ShowFrameColor{\color{red}}
%---------------------------------------------------------------%
\begin{document}
\begin{center}
\begin{tikzpicture}[
node distance=2mm,
start chain = going right,
arrow/.style = {shape=signal,
signal from=west, signal to=east,
signal pointer angle=110,
draw, font=\small,
minimum height=13mm, inner xsep=5pt, align=left,
top color=blue!80!green!80, bottom color=blue!30,
drop shadow,
on chain
}
]
\foreach \Smois in {Railroad\\ blocking , Train\\ scheduling ,
Locomotive\\ assignment , Crew\\ pairing ,
Crew\\ rostering }
\node[arrow] {\Smois};
\end{tikzpicture}
\end{center}
\end{document}
which produce:
(red lines indicates text area borders)
and tikzpicture's preamble, which use in above MWE replicate image shown in OP question:
node distance= 0mm,
start chain = going right,
arrow/.style = {shape=signal,
signal from=west, signal to=east,
signal pointer angle=110,
draw, font=\small,
minimum height=13mm, inner xsep=5pt, align=left,
fill=gray!30, outer sep=0pt,
on chain
}