<p>As has been noted, some topics do run "across" sites. I do have a background in OR/MS myself and lo and behold so far I have been on Mathematica.SE and a bit of Stats.SE.</p>

<p>I have specialized on <a href="https://en.wikipedia.org/wiki/System_dynamics" rel="nofollow noreferrer">System Dynamics (SD)</a> which is a systems modeling paradigm introduced mainly by Jay Forrester in the late 50s.</p>

<p>As of a week ago I have proposed a new Stack Exchange site in <a href="http://area51.stackexchange.com/">Area 51</a> which I have called <a href="http://area51.stackexchange.com/proposals/95927/business-simulation-and-modeling?referrer=F_RkKhnRJ6zHEOEwzGGm6g2"><strong>Modeling and Simulation</strong></a>. The core criteria for that site in my opinion are:</p>

<ul>
<li>use of <em>models</em> (which includes conceptual models not only quantitative models)</li>
<li>and/or use of <em>computer simulation</em> typically (but not exclusively) using common paradigms like System Dynamics (SD), Discrete Event Simulation (DES) or Agent-based Modeling (ABM)</li>
<li><em>supporting decision making</em> in management of a complex system (e.g. some link to optimal control)</li>
</ul>

<p>It is of course all fresh but instead of running around on very specialized sites there is merit I believe to have a dedicated page for <strong>Modeling and Simulation for Decision Support</strong>. Especially since pages dedicated to OR/MS, or System Dynamics and other topics in this area are often raising too little interest.</p>

<p>Maybe that is a site for you (and hopefully others) to help grow?</p>

<hr>

<h2>Update</h2>

<p>As of today I have created a proposal for <a href="http://area51.stackexchange.com/proposals/98921/management-science?referrer=F_RkKhnRJ6xMlbSbLunD4A2"><strong>Management Science</strong></a> on Area 51 which I feel is somewhat lacking -- and which has an even broader focus than Modeling and Simulation.</p>
