• Made more use of contractions. ...

• Minor tweaks to formatting and text.
• Clarified that all prices are in USD.
• Removed duplicated paragraph about suppliers.
• Added Date_Completed attribute to Order_Head.
• Clarified criteria for order completion.

• Switched to BDL scenario. ...

• Created IE version of BDL ERD.

Moved scenario-specific code into scenario subtree and factored out globally defined values into various configuration files. Also replaced a bunch of things with global constants.