<p>what’s the diff between industrial engineering and mechanical engineering? Can mechanical engineers apply for industrial engineering phd programs after obtaining their undergrad?</p>
<p>I don’t think the two fields have anything really in common. Just do some basic googling and read up on them. </p>
<p>But, I think you can apply for phd in industrial engineering with a background in mechanical engineering. The other way around is possible too ,but probably a bit more difficult.</p>