An aircraft company has an order to refurbish the interiors of 18 jet aircraft. The work has a learning curve percentage of 80. On the basis of experience with similar jobs, the industrial engineering

department estimates that the first plane will require 300 hours to refurbish. Estimate the amount of

time needed to complete

a. the fifth plane.

b. the first 5 planes.

c. all 18 planes.


. Estimate the time it will take to complete the fourth unit of a 12-unit job involving a large assembly

if the initial unit required approximately 80 hours for each of the following learning percentages.

a. 72 percent

b. 87 percent

c. 95 percent