Interactive Billing Overview
Use Interactive Billing when you need to generate invoices one at a time, to ensure that each invoice contains the appropriate charges and related information.
Multicompany
If you use the Multicompany feature, you set up Billing options by company, and lower levels of the Work Breakdown Structure (phases, tasks) for any project may belong to different companies. During invoice processing, Vision includes for billing all of the projects owned by (created within) the active company. This is true even if the active company does not own all of the phases or tasks below a given project in the WBS.
Multicurrency and Multicompany
If you use both the Multicompany and Multicurrency features, it is possible that different elements of the WBS (projects, phases, and tasks) are owned by different companies in the enterprise, and that these elements have differing currencies.