SOA Patterns > Foundational Service Patterns > Functional Decomposition
Functional Decomposition (Erl)
How can a large business problem be solved without having to build a standalone body of solution logic?
Problem
To solve a large, complex business problem a corresponding amount of solution logic needs to be created, resulting in a selfcontained application with traditional governance and reusability constraints.
Solution
The large business problem can be broken down into a set of smaller, related problems, allowing the required solution logic to also be decomposed into a corresponding set of smaller, related solution logic units.
Application
Depending on the nature of the large problem, a serviceoriented analysis process can be created to cleanly deconstruct it into smaller problems.
Impacts
The ownership of multiple smaller programs can result in increased design complexity and governance challenges.
Principles
N/A
Architecture
Service
Distributed computing is based on an approach where a large problem is decomposed and its corresponding solution logic is distributed across individual solution logic units. On its own, this pattern results in the decomposition of the larger problem into smaller problems, as shown in the top part of this figure. The actual definition of solution logic units occurs through the application of subsequent patterns in this chapter.
Related Patterns in This Catalog
Related Service-Oriented Computing Goals
Increased Business and Technology Alignment, Reduced IT Burden
This page contains excerpts from:
SOA Design Patterns by Thomas Erl
(ISBN: 0136135161, Hardcover, Full-Color, 400+ Illustrations, 865 pages)
For more information about this book, visit www.arcitura.com/books.