For a paced transfer line with 3 machines and without buffer, if each machine fails on average every 10 cycles and average repair time is two cycles. What is the availability of the line? (Assume that the failure and repair time follows a geometric distribution).   

For a paced transfer line with 3 machines and two buffers as shown in the following figure, it sees 20 jobs arriving per day in steady state. The average work-in-process inventory level at each buffer (B1 and B2) is 40 jobs. Jobs can require anywhere from 4 to 10 operations and processing time per operation, and can take anywhere from 60 minutes to 3 hours. Machines may fail and require 4 hours to several days to repair. Assume each day has 8 effective working hours. On average, how long does it take a job to go through the line?

A manufacturing cell with Kanban control produces 16 different types of cylindrical metal rods that are used in several assembly cells spread across a 1,000,000 sq. ft. complex consisting of four buildings.  One particular rod (A3416) is used by three different assembly cells for a consistent total demand rate of 60 rods per hour.  The rods are moved in containers that hold 5 rods.  It typically takes 5 hours to replenish a container of rods but that time varies by up to 20%. How many kanbans should be used for the production of rod (A3416)? 

TRUE or FALSE: The main requirement of a good heuristic is that it provides solutions that agree with past decisions made by the problem owner.

Age-related changes in the respiratory system include a decrease in lung elasticity and a reduction in the efficiency of gas exchange.

Which of the following best describes the function of the mucociliary escalator in the respiratory system?

Use the mRNA table to state what amino acid would be selected by the  messenger RNA codon CUC? ______________________________

How does this organism move? 

How does this organism move?   

9. A farmer wants to fence in a rectangular plot of land adjacent to the north wall of a barn (see diagram below) measuring . No fencing is needed along the barn side. What dimensions will minimize the cost of fencing materials?