ITA...how it works?

[seeak]

Hello there..
I've seen some of you guys have a CRS 430+ / 450+, enough points to get an ITA...however some other profiles that have less CRS score already got it.

I'd like to know how it works? I mean the ITA depends of the country of origin? maybe the NOC?

Thanks

 

[bellaluna]

http://www.cic.gc.ca/english/department/mi/