This diagram shows how Commercial Aviation Services enables its customers, suppliers and employees to interact and provide and subscribe to services.  The diagram has two main Application types - Front Office and Back Office. 

Front Office applications are software that faces the customer directly.  It provides the functionality and data necessary to take orders, configure complex products and provide effective service and support to customers.  It includes Sales, Marketing, Customer Relationship Managements and Shipping and Receiving applications. 

The Back office software does not interact directly with the customer. It provides functionality for internal operations such as enterprise resource planning (ERP), inventory control, Contracts, Legal, manufacturing and all of the supply chain activities associated with procuring goods, services and raw materials. 

The Enterprise Service Bus is a logical representation of an Architectural methodology where data from all the enterprise applications can be accessed seamlessly.   The ESB provides a dependable and scalable infrastructure that connects disparate applications and IT resources, mediates their incompatibilities, orchestrates their interactions, and makes them broadly available as services for additional uses.

SA-8 Systems Evolution Matrix

Type	Domain	Services and Applications	Functions	Existing / Planned / Retire
Front office	CAS	CAD/CADCAM v7.1	Engineering	E
Front office	CAS	Product Data Management system	Engineering	E
Front office	CAS	Production Plant Monitoring System v4.2	Manufacturing	E
Back Office	Finance and Administration	PRISM Accounts Receivable/Payable	AR/AP	R
Back Office	Finance and Administration	SAP General Ledger	General Ledger	R
Back Office	Finance and Administration	SAP HR Module	HR	R
Back Office	Technology Support	CA UniCenter	Service management	E
Back Office	Technology Support	Remedy Help Desk	Help Desk	E
Back Office	Technology Support	SharePoint 2007	Collaboration	E
Back Office	Technology Support	NetMeeting	Collaboration	E
Back Office	Technology Support	GoToMeeting	Collaboration	E
Back Office	Technology Support	Colloraborate Anywhere	Collaboration	P
Back Office	Technology Support	Symantec	Virus protection	E
Back Office	Technology Support	Network IDN	VPN	E
Back Office	Contracts and Legal	LEXUS/NEXUS Law Reference v4.8	Law Library	E
Back Office	Contracts and Legal	PRISM (Computer Associates) Contracting System v6.1	Contracting system	R
Back Office	Shipping and Receiving	Pitney Bowes Shipping Center v3.5 (Node)	shipping	E
Back Office	Shipping and Receiving	FEDEX Tracking System (Node)	tracking	E
Back Office	Shipping and Receiving	KHA Warehouse Inventory System	Inventory	R
Back Office	Shipping and Receiving	Intermec Bar Code Readers/Database v2.42	Bar code	E
Back Office	Finance and Administration	SAP ERP	GL, AR, AP, HR, Contracting System), Cost Accounting, Inventory)	P
Legend: P=Planned; E=Existing; R=Retire

SA-8 Systems Evolution Diagram