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Number of SSV's:

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Number of Solutions:

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Suspected Sources of Variations (SSV's)
Tool for pinpointing
Technical solutions
Faster tool wear
MVA
Center drill point
Faster tool wear
OBS
Change blade sooner
Faster tool wear
MVA
Center web on drill
Faster tool wear
MVA
Align drill holder
Faulty grinding fluid
OBS
Use more , cleaner , less oily and thinner fluid
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