porter_model+diagram.tex

% http://www.texample.net/media/tikz/examples/TEX/porter-model.tex
% Porter model
% Author: Charles-Axel Dein
\documentclass[10pt,a4paper]{article} 

\usepackage[hmargin=2cm,vmargin=1cm]{geometry}
\renewcommand{\rmdefault}{bch} % change default font

\usepackage[english]{babel}
\usepackage[utf8]{inputenc}
\usepackage{tikz} 
\usetikzlibrary{arrows,decorations.pathmorphing,backgrounds,fit,positioning,shapes.symbols,chains}

%%%<
\usepackage{verbatim}
\usepackage[active,tightpage,floats]{preview}
\setlength\PreviewBorder{5pt}%
%%%>

\begin{comment}
:Title: Porter model

A Porter five (or six) forces model.


\end{comment}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% BEGIN DOCUMENT
\begin{document}

\begin{figure}[h]

\centering
\begin{tikzpicture}
    [node distance = 1cm, auto,font=\footnotesize,
    % STYLES
    every node/.style={node distance=3cm},
    % The comment style is used to describe the characteristics of each force
    comment/.style={rectangle, inner sep= 5pt, text width=4cm, node distance=0.25cm, font=\scriptsize\sffamily},
    % The force style is used to draw the forces' name
    force/.style={rectangle, draw, fill=black!10, inner sep=5pt, text width=4cm, text badly centered, minimum height=1.2cm, font=\bfseries\footnotesize\sffamily}] 

    % Draw forces
    \node [force] (rivalry) {Rivalry among existing competitors};
    \node [force, above of=rivalry] (substitutes) {Threat of substitutes};
    \node [force, text width=3cm, dashed, left=1cm of substitutes] (state) {Public policies};
    \node [force, left=1cm of rivalry] (suppliers) {Bargaining power of suppliers};
    \node [force, right=1cm of rivalry] (users) {Bargaining power of users};
    \node [force, below of=rivalry] (entrants) {Threat of new entrants};

    %%%%%%%%%%%%%%%
    % Change data from here

    % RIVALRY
    \node [comment, below=0.25 of rivalry] (comment-rivalry) {(+) A war against Microsoft\\
    (+) Limiting sunk costs\\
    (+) Coopetition};

    % SUPPLIERS
    \node [comment, below=0.25cm of suppliers] {(+) Efficiency\\
    (+) Attracting other developers\\
    (+) Creating a Chrome community};

    % SUBSTITUTES
    \node [comment, right=0.25 of substitutes] {(+) Portability};

    % USERS
    \node [comment, below=0.25 of users] {(+) Increasing the user information\\
    (+) Reducing the switching costs};

    % NEW ENTRANTS
    \node [comment, right=0.25 of entrants] {(+) EC vs. Microsoft};

    % PUBLIC POLICIES
    \node [comment, text width=3cm, below=0.25 of state] {(+) Positively framed\\
    (+) Transparency\\
    (--) A new monopoly?};

    %%%%%%%%%%%%%%%%

    % Draw the links between forces
    \path[->,thick] 
    (substitutes) edge (rivalry)
    (suppliers) edge (rivalry)
    (users) edge (rivalry)
    (entrants) edge (comment-rivalry);

\end{tikzpicture} 
\caption{FOSS in Chrome influences industry structure by increasing competition}
\label{fig:6forces}
\end{figure}

\end{document}