Design Using Logarithmic Distributions (Statistical
analysis is used in part and assembly design to determine
if it will perform the intended function, without
failure, for the required duration when installed
and operated correctly in a specified environment.
There are three parts to this project: first, quantitatively
compare the current test design at Stryker Medical
to that used at Stryker Instruments. Secondly, develop
a reliability testing calculator that determines required
testing parameters for accelerated simulated life
tests, go-no go testing, testing longer than required
life, and testing to failure. The variables involved
are sample number, mean time to failure, confidence
level, and reliability. Other variables may be used
depending on the type of distribution (Weibull, single
parameter logarithmic) to model behavior.
These parameters, if used, should have a physical
meaning or must be related to other defined reliability
parameters. Thirdly, using the new/chosen model and
past test data, create a library of testing parameters
according to part/assembly, failure type, and testing
type, that may be used in future test design and analysis.
* Summary prepared by Michael Hernandez, Associate
Project Manager, Stryker Medical, email@example.com