Plz tell me What are the advantages and disadvantages of keeping material master internal and external number range?
Advantage of external number
Firstly you can give name or number which is easy to remember by user.
Second you can use alphabets and number for naming.
Disadvantage of external number
You have to guess all time you create material master.
Advantage of internal number
System will give the next number available so you don't need to take time to think about naming convention.
Disadvantage of internal number
You can only have number(digits) as material master number.