The Work Orders app is the center of Method:Field Services and it's purpose to allow you to manage one-time and recurring work orders.
In this app, you can:
Manage items in the work order
Create, print, and email invoices from work order (bulk actions available too)
Create work orders via the calendar
This app is used in conjunction with the Field Crew App:
Work order is created in the Work Order App.
Work order is viewed by your team in the field using the Field Crew App.
Work order is completed in the Field Crew App.
Work order is processed and invoices are sent out using the Work Order App.