Back Orders for ERP: data model references ?

Posted by Patrick Honorez on Stack Overflow See other posts from Stack Overflow or by Patrick Honorez
Published on 2010-04-07T09:13:35Z Indexed on 2010/04/07 13:53 UTC
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database-design

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business-logic

I have built an ERP using Sql Server as a back-end.
These are the different types of Client documents (there are also Supplier Docs):

Order -- impact: BO
Delivery Note (also used for returns, with negative quantity) --impact: BO, Stock
Invoice --impact: accounting only
Credit Note --impact: accounting, BO

I use a complex system of self joins (at detail level) to find out the quantities in each OrderDetail that still have a backorder (BO). It'd like to simplify this using a [group] field that could be used through all detail line related to an original order.
There are many difficult things to trace: a Return of a product may be due to a defect and thus increase the BO, or it can be just a return, joined with a Credit Note, and then has no impact on BO.

My question is: do you know of any real good reference (book, web) for this matter ?

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