Orders work the exact same way that Quotes and Invoices work.
You can create Orders for Customer/Clients inside of the Contact manager and/or the Orders Module. Orders currently pull parts and services from the Inventory Module.
Order Status Definitions
New: The order has not been saved, and will be lost if the order form is closed without saving.
Order Placed: The order has been saved, and any stock has been allocated from inventory. If an order is in this state it is either waiting on back-ordered inventory, or waiting on payment completion.
Ready To Ship: The order has some items on it which require shipping, and either payment has been received or no payment is required prior to shipping.
Complete: The order has been filled, payment received and products shipped if necessary
Cancelled: The order was cancelled
Pending Order: An order where the customer is unknown. Typically this is an order placed through an external system such as a website shopping cart. You can match a pending order to an existing customer or bring them in as a new contact..