# Tikz environment

How can I get the following figure using Tikz environment please?

• @Psychonaut, not much, ... made a sketch as many others, when ask the first question here, however, I have in mind similar question where we hadn't be so rigorous and down vote the question. – Zarko Nov 27 '15 at 20:12

An alternative starting point to make own solution. To understand code, I suggest you to read TikZ manual, chapter: "TikZ ist kein Zeichenprogram".

\documentclass[tikz, border=2mm]{standalone}
\usetikzlibrary{arrows.meta, positioning}

\begin{document}
\begin{tikzpicture}[
node distance = 12mm,
box/.style = {draw, rounded corners, minimum width=22mm, minimum height=9mm,
inner sep=2mm},
arr/.style = {draw=gray, ultra thick,-{Triangle[fill=gray]},
shorten < = 2mm, shorten > = 2mm}
]
\node (n1)  [box]               {Text 1};
\node (n2)  [box,right=of n1]   {Text 2};
\node (n3)  [box,below=of n1]   {Text 3};
\node (n4)  [box,below=of n2]   {Text 4};
%
\draw[arr]  (n1) edge (n2)  (n1) edge (n3)  (n2) edge (n4)  (n3) edge (n4);
\end{tikzpicture}
\end{document}

There are several answers of how you can position nodes relatively. I would choose this way.

Since I am not allowed to comment, I added an answer with a little example code.

The basic idea is to start with one node at a random place, give it a label (1) and position all other nodes relative to this one. Also I used a style to define the size and the dimensions.

Since I do not know how much to explain, please ask if something is not clear.

\documentclass[tikz, border=2pt]{standalone}
\usepackage{siunitx}
\begin{document}
\begin{tikzpicture}[
block/.style = {%
rectangle,
minimum width = 2cm,
minimum height = 1cm,
node distance = 3cm,
draw = black,
}
]
% nodes
\node[block] (1) at (0,0) {Text 1};
\node[block, right of = 1] (2) {Text 2};
\node[block, below of = 2, yshift = 1cm] (4) {Text 4};
\node[block, below of = 1, yshift = 1cm] (3) {Text 3};

% lines
\draw[->] (1) -- (2);
\draw[->] (2) -- (4);
\draw[->] (3) -- (4);
\draw[->] (1) -- (3);
\end{tikzpicture}
\end{document}