Caroline B Smith

US Patent:

6763337, Jul 13, 2004

Filed:

Mar 3, 2000

Appl. No.:

09/518213

Inventors:

Dinesh Verma - Centreville VA
Caroline Smith - Harrisonburg VA

Assignee:

Lockheed Martin Corporation - Bethesda MA

International Classification:

G06F 1518

US Classification:

706 9, 706 8

Abstract:

A method, and a system applying the method, for an exact and computationally efficient solution for defuzzification uses linear and non-linear weighted wedge approaches. Fuzzy numbers are used to represent parameters in a number of applications, including design dependent parameters (DDPs) for a project in particular. A defuzzification technique is used within the domain of fuzzy logic, fuzzy set theory, and multi-valued logic to overcome the problem of the lack of absolute ordering of a fuzzy number representation. The requirement profile for the DDP (the fuzzy representation of customer requirements) is compared to the anticipation profile for the DDP (the fuzzy representation of expected performance) in three dimensions. In two dimensions, the area of overlap between the DDP requirement profile and the DDP anticipation profile represents how well the customer requirements have been met. In three dimensions, the area of overlap is projected onto a wedge to obtain a volume of overlap, in order to give higher preference to higher DDP values than lower DDP values in the area of overlap, for a more accurate analysis.