4. Bill Sorn supervises an operation that habitually requires readjustment by a skilled machinist once every 3 weeks (120 hours). It takes the machinist 2 hours to make the adjustment. In addition, the operation is usually idle for 2 hours before the machinist arrives. Bill thinks that the operator should be taught to do the adjustment. If the operation is not held up for anything other than the adjustment: a. What is the availability of the operation? b. What are the issues concerning the operator doing the adjustment? c. What other issues should be addressed here?

Nicholas, John. Lean Production for Competitive Advantage: A Comprehensive Guide to Lean Methodologies and Management Practices (p. 198). CRC Press. Kindle Edition.