Delivery creation cut off time SAP Sales order

Hi ,

Please help me how do i maintain delivery creation cutoff time in SAP for different scenarios :

1 . Order placing after 6 PM should not be allowed to create delivery and it can be scheduled for next day , how to configure that .

2 . Also how to get the time set to create a delivery ?, if i want my order to be delivered in 24 hrs then how do i set up in SAP with route settings ?, What time do i configure to get 24hrs ?

Please help.