It is a well-known principle that the engineer should not tell the contractor how to do the work; but, if the engineer observes that the contractor’s construction methods appear to be unable to meet the specifications. Required:
What should the engineer do?

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.