© 2004 Cayman Business
Systems
Rev:
Pre-G3 - Rendered Thursday,
February 12, 2004
•Stratification Analysis determines
the extent of the problem for relevant
factors.
∆Is
the problem the same for all shifts?
∆Do all
machines, spindles, fixtures have the same problem?
∆Do customers in various age groups or parts of the
country have similar problems?
•The important stratification factors will vary with each
problem, but most problems will have several factors. Check sheets can be
used to collect data. Essentially this analysis
seeks to develop a pareto diagram for the important factors. The hope is that the extent of the problem will
not be the same across all factors. The differences
can then lead to identifying root cause.
•When the 5W2H and Stratification
Analysis are performed, it is important to consider a number of indicators. For example, a customer problem identified by warranty claims may also be reflected by
various in-plant indicators. Sometimes, customer surveys may be able to define the problem more clearly. In some cases analysis of the problem can be
expedited by correlating different problem
indicators to identify the problem clearly.