Generic Part Manufacturability Check Sheet
I'm trying to evaluate surface roughness against other machinability measures.
I recently purchased the Engineers Edge Design For Manufacturability and Assembly Book.
In the Appendix, there is a Generic Part Manufacturability Check Sheet. Though, I can not find explanation of its use.
I'm anticipating that the sheet can be used to identify areas which contribute most to DFM. The higher the Measure Quantity, the higher the contribution to manufacturability and thus cost.
The one item i'm not sure how to represent is Surface Roughness.
The sheet specifies the "Quantity or Measure" to be "micro-inch". But the "Unit Multiplier" is "One divided by %".
How do I derive a percent from the "micro-inch" units?
Thank you for your input.