Key System Concepts
The following are the key systems concepts embodied in a diagram of the entity classes which reflect the major elements of the NERDS software application.
| LevelOneUser | - the highest user access level, includes upper management, sales & marksting staff and accounts payable section users |
| LevelTwoUser | - the lowest user access level, includes customer service department, shipping / receiving department and accounts receivable sections users |
| Customer | - the person buying the product from Media Deliveries, having a unique file in the customer database |
| Publication | - the sale object purchased by a customer |
| SalesReport | - the generated list showing sales representing selected search criteria, ie. publication object, sales time frame, etc. |
| OrderReport | - the generated list of total publications to be purchased by Media Deliveries for a particular time period that is sorted by selected vendor |
| Delivery List | - displays all customers unique to a specified geographical route including their addresses and publication selections |
| CustomerBill | - the generated alphabetical forms of all the customers in the database displaying individual outstanding balances, current month's charges, address, etc. |
| CustomerDatabase | - the database that contains a list of all customers and their customer information |
