Steps:

1.Right-click on the operation you want to split and select [Operation] – [Edit Operation…] from the popup menu.
2.Specify a split ratio for the property “Split number” in the Split tab of the properties window.
3.If you reschedule, the operation will be split and assigned according to the specified split ratio.

4.When you specify a split ratio, use semicolons to separate numbers, e.g. 1;1.