Difference between perpetual and non-perpetual inventory system-SAP B1 9.0 ?

Hello Exports,

Greetings..!!!

Can any one explain briefly, what will be happen if i UN Check the Perpetual Inventory..?

If i UN Check the perpetual inventory any future problems will get..????

and what is the difference between perpetual and non perpetual inventory system....??

thanks in advance,

Shivanand Reddy