Which Questions Should We Come To Understand Before Choosing Stone Crusher Line

Which questions should we come to understand before choosing stone crusher line?
1.What is the raw material. If the raw materials are very hard;which will affects the capacity of the whole line.
For example : quartz,feldspar,calcite,gypsum,dolomite,... and so on

2.what is the size of raw material, if the raw material is  big,we need to choose a primary crusher ,of course,the price will be high.
For example:1000-1200mm,600-700mm,300-500mm and so on.