What are the meanings of the Different Order Types, Catagories and Fields within E3?

From Top to bottom:

Alternate Source - If the Alternate Source module is active and configured, then any orders associated with advantageous replenishment or forward buy purchases that could be made from a secondary source will be located in this category.

Due Orders - Orders that must be responded to and accepted daily in order to achieve service level objectives. These orders could include items with any of the subsequent item checks listed below.

Forward Buy - Orders that are not Due, but they have deal opportunities about to expire. (You must have the Deal Module installed and Deal Records configured for Forward Buy Orders to appear in this category).

Planned - Orders that are not Due, but that have items containing buyer Planned quantities. (You must have the Plan Module installed and Plan Records configured for Planned Orders to appear in this category).

Booked -  Orders that are not Due, but that have items containing buyer Booked quantities. (You must have the Booking Module installed and Booking Records configured for Booking Orders to appear in this category).

Transfer - Orders that are not Due, but that have items containing Transfer Order quantities. (You must have the Overstock Transfer Module installed and configured for Transfer Orders to appear in this category).

Back Orders - Orders that are not Due, but that have items containing Back Order quantities. 

'A' Order Points - Items that are ready to be ordered on their own merits but the overall service level for the vendor is not in jeopardy and the Service Goal for the items is above the level defined as the OP Prime Limit % in the Company Control Factors.

Order Point - Items that are ready to be ordered on their own merits but the overall service level for the vendor is not in jeopardy.

Buyer Order Point - Order is not due, but contains items whose balance has reached a manually set minimum in days or units.

Accepted - Orders that have been Accepted from the categories defined above but have yet to be Purged from the Advanced Replenishment system (typically, because the Creation Method in the CCF Order Control tab has been set to B = Batch and no corresponding job has run yet to complete the Purge of the order from the system). Orders in this category have the possibility of being Unaccepted (reversing the effects of SOQ/On Order amendments and allowing the buyers to manipulate the order once more).

Purged - Orders that have been accepted from the categories defined above and have also been Purged from the Advanced Replenishment system (typically, because the Creation Method in the CCF Order Control tab has been set to I = Interactive and a corresponding job has run to complete the Purge of the order from the system). Orders in this category do not have the possibility of being Unaccepted (reversing the effects of SOQ/On Order amendments and allowing the buyers to manipulate the order once more). However the order can be recalculated to allow the buyer a chance to place subsequent purchase orders that same day (albeit with the On Order figures accounting for the increase in recent Purged SOQs).

Deactivated - Orders where the Vendor has been assigned a Deactivate Until Date that has yet to be reached (i.e. has been set into the future). Such Orders are no longer displayed on the TODO menu so as to prevent ordering until the Deactivate Until Date has been reached.

Delayed - Orders that are not Due, but that have items that are 1 or more days away from their OP.

 

Once a replenishment order in E3 has been recalculated (either automatically via the overnight process or after a manually by the buyer), E3 will assign the most appropriate Order Type based on the most important characteristics currently associated with items on the order. So an order can have only one type at a time.

 

The importance of  the characteristics associated with items follows the sequence of the order type listed below and/or by the letter displayed before the order type