Single level planning

What setting to be done for single level planning of following BOM.

M1

M1.1

M1.3

M1.2

M1.5

When MRP is run for M1...it shud create planed order for M1 only.....and when MRP is run for M1.1 then it shud create planed order for M1 .1 only...similarly for M1.2.