which version of Windchill MPMLink you are using ?
routing sheet in Windchill means Work instruction and they are dynamic in nature.
In order to get Work instructions you need to create Process plan with Operations and sequences with part and resource allocations.
Using process plans you can define:
• The operations needed to carry out the manufacturing of a product.
• The sequences in which these operations are carried out.
• The time, costs, and constraints for each operation.
• The physical resources and skills required to carry out operations.
• The parts required to manufacture the product, as well as where and how they are used during the manufacturing process.
Hope you get the detailed answer as above.