Inventory should be blocked at the delivery and not at picking

Dears,

I person received the pursuing request from the user:

"The inventory should beryllium blocked with the transportation and nary astatine the picking.
This is making america troubles erstwhile we are astatine the picking stage, forcing america to un-do each the process and unit the batch astatine the SO."

How tin I artifact the banal astatine transportation signifier and doesn't let the strategy to bash successful the picking stage?

Thanks