Scalable,Constant or Variable formula line

1.What is the purpose of “Scalable tick and Untick” in formula line.

2.Consumption in formula is Constant or Variable what does that indicate?

Scalable is if the consumption is scalable. If you set 1 in the formula which is per the stocking UOM and then you make 10 is the component consumption 10 or 1 - so is it scalable. Obviously this only relates to a line where the consumption is variable. So if ticked it would be 10 for 10 if cosumption is variable. If constant it is 1, if not scalable it is 1. Constant or Variable is standard AX BOM functionality incorporated which in essence is the same as scalable.