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Part 3 of Dan Tasker’s Requirements in Context series continues to look at high-level requirements, narrowing the context to that of a project charted to deliver an IT-bases solution. It discusses how scope statements that identify functional capabilities are a good source of HLRs.

The article goes on to discuss how, when the scope is represented visually, either as a Level Zero Dataflow Diagram or a UML Use Case System Context diagram, those models can be used to derive functional HLRs.

The following Use Case System Context diagram is presented as an example:


Each use case is discussed and a corresponding example HLR is presented.

“The system shall be able to identify the appropriate tax that applies to the purchase of a given product based on the product type and the tax authority(s) that have jurisdiction where the shipment is to be delivered.” 

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Dan Tasker

Dan is the author of over 30 requirements-related articles and other resources. His 45+ year career in Information Technology has involved organizations in a variety of industry sectors in the United States, Canada, Australia, and New Zealand. His business analysis experience includes projects involving in-house software development, software vendor solution development, and COTS software acquisition and implementation. He continues to be passionate about quality requirements and helping business analysts produce them. He can be contacted at [email protected].

2020-04-13 Scope-based High-Level Requirements Scope-based High-Level Requirements

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