# How to format equation description?

A small piece of code after equation

  \begin{tabbing}
where \= $fTTsc$:~  traveling time (office to site and back to office).\\
\>$fTIsc$:~time to get safety instructions (this is specially true in \\
\>\; industrial environment)\\
\>$fSNETtsc$:~setting up survey network.\\
\end{tabbing}


How can I use tab or something else so that (line 1 traveling,line 2 time,line 3 setting)comes in one vertical line.

where
fTTsc:     traveling time (office to site and back to office).

fTIsc:     time to get safety instructions (this is specially true in
industrial environment)

fSNETtsc:  setting up survey network.


I 'm breaking manually (which took a lot of time for 15 sentences) but how to do it automatically so that it looks perfect and nice.

time to get safety instructions (this is specially true in \\
\>\; industrial environment)\\

-

Silently stolen from this answer (click).

\documentclass[preview,border=12pt,12pt]{standalone} % change it back to your own document class
%\documentclass[12pt]{article}
\usepackage{array,tabularx}

\newenvironment{conditions*}
{\par\vspace{\abovedisplayskip}\noindent
\tabularx{\columnwidth}{>{$}l<{$} @{${}={}$} >{\raggedright\arraybackslash}X}}
{\endtabularx\par\vspace{\belowdisplayskip}}

\begin{document}

An equation just to start
$$fTTsc+ fTIsc + fSNEtsc = 0$$
where:
\begin{conditions*}
fTTsc       &   traveling time (office to site and back to office)\\
fTIsc       &   time to get safety instructions (this is specially true in industrial environment) \\
fSNETtsc    &   setting up survey network
\end{conditions*}

\end{document}


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By the way, I think you need to selectively choose the correct font for the variables, which one should be regarded as text subscript with normal text font, etc, etc. –  kiss my armpit Jul 19 '14 at 15:32

Here are two ways to do — to be adjusted according to the real data, equations, &c.

        \documentclass[ a4paper]{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[showframe, nomarginpar]{geometry}
\usepackage{array, mathtools}

\begin{document}
$\text{Some more or less complex equation, }$%
where:  \begin{tabular}[t]{!{\vrule width0.8pt}>{$}l<{$}@{\ }l@{}}
fTTsc:  & traveling time (office to site and back to office).\\
fTIsc:   &    \parbox[t]{0.5\textwidth}{time to get safety instructions (this is specially true in
industrial environment)}\\
fSNETtsc: &   setting up survey network.
\end{tabular}
\vskip 2ex

\begin{align*}
\text{Some}  & \enspace \text{more or less complex equation} \\
\text{where: } &\mathrlap{ \begin{alignedat}[t]{2}
fTTsc: & \   & &  \text{traveling time (office to site and back to office) }\\
fTIsc:   & &    &     \parbox[t]{0.42\textwidth}{time to get safety instructions (this is specially true in industrial environment)} \\
fSNETtsc: & &    &   \text{setting up survey network.}
\end{alignedat}}\\