Invoices

This ERD (see the following figure) illustrates the invoicing and payment processes. An invoice can be considered a receivable or a payable for the company. It can be generated to bill for an order, a project, a part repair, an agreement, a service request, an activity, or a period of time for products or services delivered within a specific period of time. Items on the invoice can be reconciled with one or more other entities as well. A payment can be made for one or more Invoices, and an invoice can be paid through one or more payments.

The following table lists the entities in this ERD and their corresponding tables.

Entity	Table
Activity	S_EVT_ACT
Agreement	S_DOC_AGREE
Expense	S_EXP_ITEM
Invoice	S_INVOICE
Invoice Attachment	S_INVOICE_ATT
Invoice Item	S_INVOICE_ITEM
Order	S_ORDER
Order Item	S_ORDER_ITEM
Part Movement	S_ORDPART_MVMT
Part Repair	S_PART_RPR
Payment	S_SRC_PAYMENT
Period	S_PERIOD
Product	S_PROD_INT
Project	S_PROJ
Service Request	S_SRV_REQ
Shipment	S_SHIPMENT