In the analyze variance purpose, various kind of tool
can be used. The modification of the framework which
shown in Figure 5.0 use cause and effect diagram and
FMEA to analyze the potential cause which cause the
performance gap between the current OEE and the
benchmark OEE. Harsha et al., (2009) proposed the cause
and effect diagram to be the tool on analyzing the causes
that lead to lower OEE. Linda (2001) stated that cause and
effect diagrams are not only useful in the analysis of actual
problems. They can be used to analyze potential problems
and their potential causes. Besides, purpose of FMEA is to
determine the potential failure modes of
manufacturing/assembly processes at operation, subsystem
or system level and to eliminate as early as possible the
process deficiencies that could lead to the apparition of
defective products as well as to avoid using inadequate
methods as part of the processes. Offering solutions for the
improvement of the process design through PFMEA also
provides solutions for the development of future processes
and process validation programs.