Oracle Order Management - Order Date Type in Sales Order

What is order Date Type?
Order Date Type is Considered While Scheduling for Calculating the Requested Date as Ship From Warehouse or Arrive at Customer Location.   
What are the Available order Date Types in Order Management?
1.Ship
2.Arrival
How Does order Date Type Impact the  Schedule Ship or Arrival Date?

  If the Order Date Type is Ship, the Requested Date is Defaulted as Schedule Ship date and Arrival Date is Calculated (Ship date + In transit Time) Based on Inter location Transit Time and Other related Setups such as Shipping, Carrier and Customer Calendars

If the Order Date Type is Arrival, the Requested Date is Defaulted as Schedule Arrival date and Ship Date is Calculated (Arrival Date -Transit days) Based on Inter location Transit Time and Other related Setups such as Shipping, Carrier and Customer Calendars.
What are Constraints While Update Schedule Ship Date or Schedule Arrival Date in Sale Order?
When the Order Date Type  is "Arrival",  Scheduled Ship Date Cannot be Updated Manually.

When the Order Date Type is "Ship" or "NULL" ,  Scheduled Arrival Date  Cannot be Updated Manually.