Application of Tolerance Analysis and Allocation to Work Structuring: Partition Wall Case

Colin Milberg1 & Iris D. Tommelein2

1PhD Student, Civil and Envir. Engrg. Department, 215 McLaughlin Hall, Univ. of California, Berkeley, CA 94720-1712, 510/289-2552, FAX 510/643-8919, colinm@uclink.berkeley.edu
2Professor, Civil and Envir. Engrg. Department, 215-A McLaughlin Hall, Univ. of California, Berkeley, CA 94720-1712, 510/643-8678, FAX 510/643-8919, tommelein@ce.berkeley.edu

Abstract

Geometric tolerance as a source of variability is often ignored in project design and control research and practice. Certain best practices to buffer AEC systems from this variability are established through ‘received traditions.’ To describe the nature of this variability, basic tolerance terminology is introduced as applicable to a case study. Tolerance analysis and allocation techniques are herein applied to a very simple AEC system, a drywall partition wall with an electrical outlet. A mapping system, combining aspects of tolerance analysis tools and process mapping, reveals strategies for improved tolerance allocation that often results in the design of alternative work structures. Alternative work structures not only meet the system geometric tolerance constraints but they also attempt to remove waste from the system. The methodology for mapping and analysis are shown to mitigate geometric variations through product and process configuration. Speculation is that the same methodology is adaptable to design systems that are robust to any form of variability impacting the system.

Keywords

Tolerance, constructability, work structuring, lean construction, mapping

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Reference

Milberg, C. & Tommelein, I.D. 2003, 'Application of Tolerance Analysis and Allocation to Work Structuring: Partition Wall Case' In:, 11th Annual Conference of the International Group for Lean Construction. Virginia, USA, 1-.

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