I've tried to realize it with Tikz but it seems like a bit difficult.
\tikzset{ ishikawa/.style = {align=center, inner sep=0pt, text centered, %font=\sffamily }, matter/.style={ % Wirkung=Betrachtete Störgröße rectangle,minimum size=6mm,very thick,draw=red!70!black!40,top color=white,bottom color=red!50!black!20,font=\itshape }, level_1/.style={ % Haupteinflussfaktoren ellipse,node distance=60pt,minimum size=6mm,very thick,draw=red!50!black!50,top color=white,bottom color=red!50!black!20,font= \itshape }, level_2/.style={ % Nebeneinflussfaktoren rectangle,minimum size=6mm,font=\itshape,font=\tiny } } \begin{tikzpicture}[->,>=stealth',level/.style={sibling distance = 5cm/#1, level distance = 1.5cm} ] \node (Grund) [matter] at ( 12,0) {CPA}; % \path[draw,->] (0,0) -- (Grund) \draw [->,very thick] ( 0,0) -- (Grund); \node (tl_1_1) [level_1] at ( 0,5) {Material}; \node (bl_1_1) [level_1] at ( 0,-5) {Methode}; % child{ node [level_2] {msndfbdejfsdlfksf}} \node (tl_1_2) [level_1, right=of tl_1_1] {Maschine}; % child{ node [level_2] {msndfbdejfsdlfksf}} \node (bl_1_2) [level_1, right=of bl_1_1] {Mensch}; % child{ node [level_2] {msndfbdejfsdlfksf}} \node (tl_1_3) [level_1, right=of tl_1_2] {Messtechnik}; % child{ node [level_2] {msndfbdejfsdlfksf}} \node (bl_1_3) [level_1, right=of bl_1_2] {Mitwelt}; % child{ node [level_2] {msndfbdejfsdlfksf}} \end{tikzpicture}]
This produces my top level boxes but I don't know how to draw a path from there to my main arrow. The same problem also for the lower level arrows.
Can someone help me out?!
cheers Gerold