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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
Drill or flutes too long
OBS
Reduce drill or flute length
Drill point is dull
OBS
Change or sharpen drill
Drill point walks
MVA
Reduce chisel edge length
Drill point walks
MVA
Use centerdrill
Drill point walks
MVA
Use four facet point
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