Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Analysis and Evaluation for STEP-Based Electro-Mechanical Assemblies



XuanFang Zha, Sebti Foufou, Sudarsan Rachuri, Ram D. Sriram


In this paper, we propose an integrated approach to assemblability analysis and evaluation for STEP-based (STandard for the Exchange of Product model data, officially ISO 10303) electro-mechanical products. First, two assembly representational models are brought up and elaborated: the EXPRESS/XML schema-based model and the NIST object-oriented UML-based Open Assembly Model (OAM). Then, these two models are integrated together, in which the OAM incorporates the EXPRESS/XML schema-based assembly model to completely capture the detailed geometric information. The proposed assembly evaluation approach uses the EXPRESS/XML schema-based model as the information source, and covers not only the geometric and physical characteristics of assembly parts but also the assembly operation data necessary to assemble the parts. The feature of this approach is the linkage of the STEP product definition to the fuzzy analytic hierarchy process (AHP) for assembly evaluation. The proposed approach has the flexibility to be used in various assembly methods and different environments. A case study shows the feasibility of the proposed approach.
Journal of Computing and Information Science in Engineering


assemblability evaluation, assembly model, design for assembly, fuzzy analytic hierarchy process, STEP


Zha, X. , Foufou, S. , Rachuri, S. and Sriram, R. (2005), Analysis and Evaluation for STEP-Based Electro-Mechanical Assemblies, Journal of Computing and Information Science in Engineering, [online], (Accessed May 30, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created July 31, 2005, Updated October 12, 2021