Categorization and representation of functional decomposition by experts
Loading...
Authors
Melancon, Paul W.
Subjects
Advisors
Langford, Gary O.
Date of Issue
2008-09
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
The objective of this thesis is to investigate different approaches to identifying system functions. The approaches that are described are standard functional decomposition process, Unified Modeling Language (UML), System Modeling Language (SySML), and Integration Definition for Function Modeling (IDEF0). A discussion is presented on advantages and limitations of describing and using functions by means of graphical formatting. Improving system functionality by effective decomposition is vital to robust system development. However, not one of these approaches presents the best method for complete functional identification. While each has its benefits and should be considered during functional analysis, a good decomposition has proper interrogation of the functions by means of coupling and cohesion of the functionality as well as identifying functional overlap and underlap. Standard functional decomposition works best as the first step in laying out system functionality. Rigor and completeness are improved when followed up by UML, SySML, or even IDEF0. Value and risk of each function can and should be identified as a way of posing a series of questions that measure and analyze the appropriateness of the functional decomposition. Combining these different approaches can help lead to a more complete functional decomposition and therefore reduce the risk to system development.
Type
Thesis
Description
Series/Report No
Department
Systems Engineering Management
Identifiers
NPS Report Number
Sponsors
Funder
Format
xvi, 71 p. : ill. ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.