Orthogonal Views…

A current definition provides us this: or·thog·o·nal   [awr-thog-uh-nl] adjective 1.  Mathematics . a. Also, orthographic. pertaining to or involving right angles or perpendiculars: an                 orthogonal projection. b. (of a system of real functions) defined so that the integral of the product of any           Continue reading “Orthogonal Views…”

Syntax of an ERD – Entity Relationship Diagram

Syntax Rules for an Entity Relationship Diagram: An Entity Relationship Diagram Sample: Use this link: https://docs.google.com/drawings/d/1keA4BzVCJXcUoNWDw7-0pIrQ7AsB5CgavjWR7P5Wyrg/edit?hl=en_US (may have to paste into a browser) Business Rules derived from this sample are: It is also interesting to note that since there is no relationship between Customer and Product there are no Business Rules that can be derived betweenContinue reading “Syntax of an ERD – Entity Relationship Diagram”

Process Modeling

Flowcharts, Data Flow Diagrams, Swim Lane diagrams, Use Cases and other constructs have been used to reflect what a Business or Systems Analyst thinks the client is describing when they talk about Business Process and the use of information in the conduct of their business. These diagrams have structure, syntax, and rules that have beenContinue reading “Process Modeling”