Robert D Atkinson

US Patent:

59562510, Sep 21, 1999

Filed:

Dec 4, 1997

Appl. No.:

8/981792

Inventors:

Robert E. Atkinson - Wichita KS
Teresa S. Miller - Wichita KS
Friedrich-Wilhelm Scholz - Shoreline WA

Assignee:

The Boeing Company - Seattle WA

International Classification:

G05B 19418
G07C 314

US Classification:

36446816

Abstract:

A process of establishing valid statistical dimensional tolerance limits for designs of detail parts that will enable accurate prediction of an economically acceptable degree of non-conformance of a large flexible end item assembly, having a set of predetermined dimensional tolerances, made from the detail parts, wherein the detail part tolerances are enlarged substantially compared to tolerances that would be necessary using an arithmetic "worst case" approach to remain within the end assembly tolerances while remaining within preestablished stress limits of the parts. A preferred assembly sequence for assembling the parts into the assembly is selected and validated. Locations, numbers and size of coordination features to be machined in said detail parts are selected, by which the parts are located relative to each other and fastened together to form the assembly. Individual part statistical dimensional tolerances are established as a fabrication requirement for the parts that enable the parts to be economically produced and assembled into assemblies that meet the predetermined assembly dimensional tolerances. The parts are produced to the individual statistical dimensional tolerances in a capable process, having a Cpk equal to at least 1.