To all Dilbert fans.. ?

I’m a big fan of the Dilbert comics, but the problem is that I find it hard to understand most its jokes.

Some of the jokes are pretty obvious though. But lots them seem hard to understand. Why is that? Or how exactly should I read them? (This is a silly question, I know, but, what else can I say..?) Or do I need some background in jobs, business, or companies (etc.) so that I can catch the joke?

For example, looking at today’s strip, can someone please tell me where is the joke in it?