When Beatrix the BA models requirements for the purchase order component of a solution, he describes the header information that shall be contained in a purchase order (eg. PO#, vendor#, customer name, customer address, PO date). He also describes the line item information that shall be contained on such a purchase order (eg. Item#, product code, product description, quantity, unit price). He states that a purchase line item cannot exist without a purchase order header. Which viewpoint is being applied as part of the requirements architecture?

BABOK is a guide to the techniques and vocabulary for the practice of business analysis. The BABOK Guide v3 define five perspectives that nowadays reflect the most common views of Business Analysis: Agile, Business Intelligence (BI), Information Technology (IT), Business Architecture (BA), Business Process Management (BPM).

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