Utilization (Golden Rainbow)

How does the utilization works?There are number of highs and lows in percentage.Could some one please explain to me what these numbers are.Thank you in advance.Shadow.

I'm guessing you mean factory utilization--is that right? If that's the case then utilization will drop if you have a material shortage or worker shortage (usually in a particular skill). I'll gues you know how to keep your material supplies flowing and focus on workers.
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Let's say your upgrades or builds causes a shortage or HTS's (high tech specialist) then production will decline in one or more of your industries. This decline will occur even though you have a surplus in all other skills

and secondly how do i know which corporations to look out for the ones that really make profits?

You're on the right track to use factory utilization. I look for an industry with utilization over 100%, but sometimes an industry will be temporarily high but be a bad choice. As you play you'll learn those.

Right now I suggest Factory Maintenence, Service, Electric Power, electrical products. Stay away from weapons (a few exceptions here), foods (other food Products has worked for me), agriculture, Mining (oil seems ok). A lot of players go with High tech (computers, electronics) and they've worked in the long run for me but they fluctuate.

Good question--good luck and have fun

Soybeans for the win ;)

Crafty

Jewelry and Luxury Goods can be pretty good, but depends on the world.

Don't forget the Big Four Defensive Ammo corps - Anti-aircraft missiles, Defensive missiles, Interceptor missiles, and Missile Interceptors.

In general, high value "consumables" are the way to go.