Atomicity

The typical definition of an atomic task or process is one that cannot be decomposed further. This is vague and subject to interpretation. The Decomposition Matrix on this site uses a specific definition: A task (for business process diagrams) or a process (for data flow diagrams) is atomic if every input relates to every output…

Date

Published:December 3, 2008 View Post


Data Flow Diagram for Services Example

Here’s a quick example of how to use the Decomposition Matrix to create a data flow diagram (DFD) that shows the decomposition of services in a service-oriented architecture (SOA). I’ve chosen a generic example of legacy systems that will be accessed by services. This will create a decomposition for a services interface layer on top…

Date

Published:September 10, 2008 View Post


Data Flow Diagram for Services

While correcting the defects noted earlier, I added an option for the display of data flow diagrams. This option displays data flow diagrams from bottom to top. This is the way many of us think of services in a service-oriented architecture (SOA). Previously, the only display option for data flow diagrams was from left to…

Date

Published:August 25, 2008 View Post