¿Alguien puede ayudarme a producir este diagrama de flujo en LaTeX?

Question

Lo que he hecho hasta ahora no se acerca a lo que quiero:

\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows}
\usepackage{mathtools}
\usepackage{ifthen}
\usepackage{pgfplots}
\pgfplotsset{compat=1.14}



\begin{document}
%Flow diagram Node Definitions
\tikzstyle{prof} = [rectangle, rounded corners, minimum width=2cm,     minimum height=0.5cm,text centered,text width=8em, draw=black, fill=red!30]
\tikzstyle{process} = [rectangle, minimum width=3cm, minimum height=1cm, text centered, text width=15em, draw=black, fill=green!30]
\tikzstyle{arrow} = [->, >=latex', shorten >=1pt, thick]
\tikzstyle{cloud} = [draw, ellipse,fill=red!20, node distance=2cm,minimum width=2.5cm, minimum height=2em, align=center]
\tikzstyle{cfr} = [rectangle, rounded corners, minimum width=3cm, minimum height=1cm,text centered,text width=15em, draw=black, fill=blue!40]
\tikzstyle{cbr} = [rectangle, rounded corners, minimum width=3cm, minimum height=1cm,text width=15em,text centered, draw=black, fill=blue!40]
\tikzstyle{hyb} = [rectangle, rounded corners, minimum width=4cm, minimum height=1cm,text width=25em, text centered, draw=black, fill=green!30]


\begin{figure}
\begin{center}
\begin{tikzpicture}[node distance=2cm]


\node (bt) [cfr] {Phase 7};
\node (pp) [cbr, right of=bt, xshift=8.5cm] {Phase 1};
\node (newuser) [cfr, below of=bt,yshift=-2.5cm, xshift=-3cm] {Phase 2};
\node (olduser) [cbr, below of=pp,yshift=-2.5cm, xshift=2cm] {Phase 3};
\node (dm) [cbr, below of=bt, yshift=-7cm] {Phase 4};
\node (dmo) [cbr, below of=pp, yshift=-7cm] {Phase 5};
\node (ver) [cloud, below of=bt, yshift=-2.5cm, xshift=5cm] {Phase 6};

\end{tikzpicture}
\caption{Process Flow}
\label{pic:flow}
\end{center}
\end{figure}
\end{document}

Answer 1

Realmente dudo que hayas producido ese código al intentar dibujar esa imagen, ya que no tiene sentido crear un montón de estilos que nunca usas con una sintaxis obsoleta y colores que no deseas. (Así que me pregunto si el código realmente proviene de alguna fuente no reconocida).

Hay paquetes para diagramas de flujo, por lo que probablemente deberías investigarlos.

\documentclass[border=10pt]{standalone}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{shapes.arrows,arrows.meta,positioning,shapes.geometric}

\begin{document}
\begin{tikzpicture}
  [
    node distance=2cm,
    >=Latex,
    cbr/.style={text centered, draw=black, minimum height=1cm, rounded corners, minimum width=3cm, text width=15em, },
  ]
  \begin{scope}[local bounding box=c]
    \draw (-.5,-.75) coordinate (a) [out=-30, in=120] to (.5,-.75) |- (-.5,.75) coordinate [midway] (b) -- cycle ;
    \clip  (a) |- (b) -- ++(0,1) -- ++(-2,0) |- cycle ;
    \begin{scope}[shift=(135:.25)]
      \draw (-.5,-.75) coordinate (a1) [out=-30, in=120] to (.5,-.75) |- (-.5,.75) coordinate [midway] (b1) -- cycle ;
    \end{scope}
    \clip  (a1) |- (b1) -- ++(0,1) -- ++(-2,0) |- cycle ;
    \begin{scope}[shift=(135:.5)]
      \draw (-.5,-.75) coordinate (a2) [out=-30, in=120] to (.5,-.75) |- (-.5,.75) coordinate [midway] (b2) -- cycle ;
    \end{scope}
  \end{scope}
  \foreach \i [count=\j] in {60,120,...,360}
  {
    \node (p\j) [cbr] at (\i:7) {Phase \j};
    \draw [<->] (p\j) -- (c);
  }
  \foreach \i/\j [remember=\i as \ilast (initially 6) ] in {1,...,6}
  {
    \pgfmathor{\i==1}{\i==4}\ifnum\pgfmathresult=1\draw  [<->, densely dotted] (p\ilast) |- (p\i);
    \else\pgfmathor{\i==2}{\i==5}\ifnum\pgfmathresult=1\draw  [<->, densely dotted] (p\ilast) -- (p\i);
    \else\draw [<->, densely dotted] (p\ilast) -| (p\i);
    \fi\fi
  }
  \node (w) [right=of p6, double arrow, draw, text width=20mm, text centered] {Arrow};
  \node [right=of w, draw, cylinder, shape border rotate=90,  anchor=center, minimum width=15mm, minimum height=30mm] {Drum};
\end{tikzpicture}
\end{document}