Vryjdfkk

I want to reproduce the following figure with tikz (because there is a typo in the text in this figure).

My tikz code is (borrowed from here)

documentclass[tikz,border=10pt]{standalone}

usetikzlibrary{decorations.text}

definecolor{mygray}{RGB}{208,208,208}

definecolor{mymagenta}{RGB}{226,0,116}

newcommand*{mytextstyle}{sffamilyLargebfseriescolor{black!85}}

newcommand{arcarrow}[3]{%

   % inner radius, middle radius, outer radius, start angle,

   % end angle, tip protusion angle, options, text

   pgfmathsetmacro{rin}{1.7}

   pgfmathsetmacro{rmid}{2.2}

   pgfmathsetmacro{rout}{2.7}

   pgfmathsetmacro{astart}{#1}

   pgfmathsetmacro{aend}{#2}

   pgfmathsetmacro{atip}{5}

   fill[mygray, very thick] (astart+atip:rin)

                         arc (astart+atip:aend:rin)

      -- (aend-atip:rmid)

      -- (aend:rout)   arc (aend:astart+atip:rout)

      -- (astart:rmid) -- cycle;

   path[

      decoration = {

         text along path,

         text = {|mytextstyle|#3},

         text align = {align = center},

         raise = -1.0ex

      },

      decorate

   ](astart+atip:rmid) arc (astart+atip:aend+atip:rmid);

}



begin{document}



begin{tikzpicture}

   fill[even odd rule, mymagenta] circle (1.5);



   node at (0,0) [

      font  = mytextstyle,

      color = white,

      align = center

   ]{

      Learn\

      $6sigma$

   };



   arcarrow{ 85}{3}{Define}

   arcarrow{290}{357}{Measure}

   arcarrow{210}{289}{Analyze}

   arcarrow{206}{146}{Improve}

   arcarrow{130}{96}{Control}



end{tikzpicture}



end{document}

and the output is

I need hints to get my figure more close the original one. Thanks

It is certainly possible to draw something of this sort. (I did not attempt to match the colors. UPDATE: corrected the orientation of the lower-most text, big thanks to manooooh!)

documentclass[tikz,border=3.14mm]{standalone}

usepackage{textgreek}

usetikzlibrary{decorations.text,arrows.meta,bending}

begin{document}

begin{tikzpicture}

newcommand{LineWidth}{10mm}

newcommand{Radius}{3cm}

node[font=sffamilybfseries,scale=3.4,anchor=south] at (0,-0.1) {LEARN};

node[font=sffamily,scale=6,anchor=north] at (0,0.5) {6textsigma};

foreach X [count=Y] in {yellow!50!orange,gray!50,cyan!50,gray,red}

{draw[line width=LineWidth,X] ({90-(Y-1)*72}:Radius)

 arc({90-(Y-1)*72}:{90-(Y)*72}:Radius);}



foreach X [count=Y] in {yellow!50!orange,gray!50,cyan!50,gray,red}

{draw[-{Triangle[bend,length={0.75*LineWidth},width={1.5*LineWidth}]},

line width=LineWidth,X] 

({90-(Y-0.5)*72}:Radius)

 arc({90-(Y-0.5)*72}:{90-(Y)*72-10}:Radius);}



foreach X [count=Y] in {Define,Measure,Analyze,Improve,Control} 

{ifnumY=3

fill[decoration={text along path, text={|Largebfseries| X},

  raise=-3pt,text color=white,text align=center},decorate] 

  ({90-(Y)*72}:Radius)

 arc({90-(Y)*72}:{90-(Y-1)*72}:Radius);

else

fill[decoration={text along path, text={|Largebfseries| X},

  raise=-3pt,text color=white,text align=center},decorate] 

  ({90-(Y-1)*72}:Radius)

 arc({90-(Y-1)*72}:{90-(Y)*72}:Radius);

fi }



end{tikzpicture}

end{document}

ADDENDUM FOR FUN: I was trying to make the corners of the arrow path round. One can design arbitrary arrows with pgfdeclarearrow, and the basis of my attempt is the example on p. 1096 of the pgfmanual. I could, however, not make pgfsetcornersarced work. (If I would have to guess, I'd probably say that this is because the examples on pp. 1069 of the pgfmanual use pgfusepath{stroke}, the analogon of which is pgfusepath{fill}. However, this is not allowed in a arrow declaration, where one has to use the quick version pgfusepathqfill, which, according to what I found, ignores pgfsetcornersarced.) So I drew the rounded corners with pgfpathcurveto. I guess that anybody who has a better intuition how these Bezier curves work will be able to make nicer rounded corners, but they may still find the following useful as a starting point.

documentclass[tikz,border=3.14mm]{standalone}

usepackage{textgreek}

usetikzlibrary{decorations.text,arrows.meta,bending}

pgfdeclarearrow{

  name =rtriangle,

  parameters = { thepgfarrowlength },

  setup code = {

    % The different end values:

    pgfarrowssettipend{.25pgfarrowlength}

    pgfarrowssetlineend{-.25pgfarrowlength}

    pgfarrowssetvisualbackend{-.5pgfarrowlength}

    pgfarrowssetbackend{-.75pgfarrowlength}

% The hull

pgfarrowshullpoint{.3pgfarrowlength}{0pt} 

pgfarrowshullpoint{-.5pgfarrowlength}{.5pgfarrowlength} 

pgfarrowshullpoint{-.5pgfarrowlength}{-.5pgfarrowlength} % Saves: Only the length:

    pgfarrowssavethepgfarrowlength

  },

  drawing code = {

    pgfpathmoveto{pgfqpoint{.28pgfarrowlength}{-0.02pgfarrowlength}}

    pgfpathcurveto{pgfpoint{.3pgfarrowlength}{0pt}}{pgfpoint{.3pgfarrowlength}{0pt}}{pgfqpoint{.28pgfarrowlength}{0.02pgfarrowlength}}

    pgfpathlineto{pgfqpoint{-.47pgfarrowlength}{.47pgfarrowlength}}   

    pgfpathcurveto{pgfpoint{-.49pgfarrowlength}{.49pgfarrowlength}}{pgfpoint{-.49pgfarrowlength}{.48pgfarrowlength}}{pgfpoint{-.5pgfarrowlength}{.47pgfarrowlength}}

    pgfpathlineto{pgfqpoint{-.5pgfarrowlength}{-.47pgfarrowlength}}

    pgfpathcurveto{pgfpoint{-.49pgfarrowlength}{-.48pgfarrowlength}}{pgfpoint{-.48pgfarrowlength}{-.48pgfarrowlength}}{pgfpoint{-.47pgfarrowlength}{-.47pgfarrowlength}}

    pgfpathclose

    pgfusepathqfill

},

  defaults = { length = 4cm }

}

begin{document}

begin{tikzpicture}

newcommand{LineWidth}{10mm}

newcommand{Radius}{3cm}

node[font=sffamilybfseries,scale=3.4,anchor=south] at (0,-0.1) {LEARN};

node[font=sffamily,scale=6,anchor=north] at (0,0.5) {6textsigma};

foreach X [count=Y] in {yellow!50!orange,gray!50,cyan!50,gray,red}

{draw[line width=LineWidth,X] ({90-(Y-1)*72}:Radius)

 arc({90-(Y-1)*72}:{90-(Y)*72}:Radius);}

%`,width={1.5*LineWidth}

foreach X [count=Y] in {yellow!50!orange,gray!50,cyan!50,gray,red}

{draw[-{rtriangle[bend,length={1.5*LineWidth}]},

line width=LineWidth,X] 

({90-(Y-0.5)*72}:Radius)

 arc({90-(Y-0.5)*72}:{90-(Y)*72-15}:Radius);}



foreach X [count=Y] in {Define,Measure,Analyze,Improve,Control} 

{ifnumY=3

fill[decoration={text along path, text={|Largebfseries| X},

  raise=-3pt,text color=white,text align=center},decorate] 

  ({90-(Y)*72}:Radius)

 arc({90-(Y)*72}:{90-(Y-1)*72}:Radius);

else

fill[decoration={text along path, text={|Largebfseries| X},

  raise=-3pt,text color=white,text align=center},decorate] 

  ({90-(Y-1)*72}:Radius)

 arc({90-(Y-1)*72}:{90-(Y)*72}:Radius);

fi }



end{tikzpicture}

end{document}