The following activities and times (in minutes) are needed for a machine operator to perform:

Remove completed units from machine = 4, Re-stock raw materials into machine = 5, Brush away waste on the floor around the machine = 2, Walk to next station = 3 (a)What is the total servicing time per machine? What is the total worker time not directly interacting with the machine?

(b)The machine runs automatically for a cycle of 150 minutes to produce 2 units. The service worker is paid $10/hr and the machine costs $15/hr. What is the optimum number of machines that can be assigned to the operator to produce the lowest cost per unit, and what is that cost per unit?

(c)Draw a worker-machine chart showing the operator and the first two machines for the situation that produces the lowest cost per unit.

(d)Determine the %idle time for the operator for the situation that produces the lowest cost per unit.

(e) Determine the %idle time for the machine for the situation that produces the lowest cost per unit. (f) Determine the productivity (units/hr) for the situation that produces the lowest cost per unit.