Dear Thiyaharaajan,
(There are so many threads already discussed in detail regarding this topic,I would suggest you to
check before posting a new thread.)
Routing is generally used in discrete manufacturing and in a routing you can create standard,alternative
and parallel sequence of operation.
In a Rate routing you can create only a standard and parallel sequence of operations and
used in a Repetitive manufacturing. However still you can use a standard routing in a repetitive
manufacturing,but the only thing needs to be taken care is that no alternative sequence of operation is
maintained in a routing. So SAP recommends to use a rate routing in a repetitive manufacturing.
Still in a rate routing you have more than one operation(it depends upon the business requirements).
Regards
Mangalraj.S