Exam 8: Supplement: Job Scheduling and Vehicle Routing and Material Flow Analysis and Facility Layouts

Assume that all of the jobs below arrived at the same time. Also assume that transfer times are zero and jobs cannot be split -Using a Gantt chart and the processing order as per the critical ratio (CR) rule, determine the average tardiness.

For the Buehler Bakery, the desired output for a 8 hour workday is 450 units. The discrete tasks required to produce the product have been identified, timed in seconds, and ordered as indicated in the table. -Assuming 1 work center per task, what is the corresponding efficiency for the maximum output per day?

For the Buehler Bakery, the desired output for a 8 hour workday is 450 units. The discrete tasks required to produce the product have been identified, timed in seconds, and ordered as indicated in the table. -Calculate the minimum number of assembly line work centers.

Assuming that the customers are ranked in proximity to one another (ie., customer 4 is closer to customer 3 than customer 5 is), use the concurrent scheduler approach to assign deliveries to vehicles such that no deliveries are late and driving distance is minimized. Assume that drive time to each customer is 15 minutes. -Determine the finish time for Vehicle 2.

The following is a sketch of process-focused facility that consists of 6 sections and the matrix for the number of material movements from one section to the next (in both directions) on a typical day. A vertical, horizontal, or diagonal move between adjacent sections is $5 while a two-section move is $10. -Calculate the total trip cost for the given layout on a given day.

Use the Cluster-first-route-second heuristic for two trucks (10 ton and 8 ton capacities) and the following network of customers with their shipping requirements, starting from location 1. -Using the Clark and Wright savings heuristic, calculate the savings for the paired combinations of delivery nodes 1, 2 and 3.

The process design team at a contract manufacturer in Thailand has broken an assembly process into 8 basic steps, each with a required time and predecessor, as shown in the table. There are 7.5 productive hours available in a day, and the manufacturer wishes to produce 400 units. -Operations managers and process engineers design a line that contains 6 stations. What is the percentage of idle time?

For the Buehler Bakery, the desired output for a 8 hour workday is 450 units. The discrete tasks required to produce the product have been identified, timed in seconds, and ordered as indicated in the table. -What should their takt time be?

Use the Clark and Wright savings heuristic for the following network of customers, starting from location 1. -For the paired combinations of delivery nodes 1, 2 and 3, calculate the savings.

William is considering a dispatch rule to satisfy more physicians. William requested that each physician put a desired completion time on each request for blood testing. To investigate the effects of changing the dispatch rules, William decides to take the first five requests for blood work from one of the technicians and analyze job completion under various scheduling rules. The following table shows the time to complete blood work on each sample and the time when the physician has requested that it to be complete. -Using the processing order as per the critical ratio (CR) rule, determine the average tardiness.

Use the Cluster-first-route-second heuristic for two trucks (10 ton and 8 ton capacities) and the following network of customers with their shipping requirements, starting from location 1. -Using the Clark and Wright savings heuristic, calculate the savings for the paired combinations of delivery nodes 1, 4 and 5.

Use the Cluster-first-route-second heuristic for two trucks (10 ton and 8 ton capacities) and the following network of customers with their shipping requirements, starting from location 1. -Route Improvement alternatives: what would the total mileage be if the 10 ton truck handles the tour 1-3-4-1 and the 8 ton truck handles the tour 1-2-5-1?

Use the Cluster-first-route-second heuristic for two trucks (10 ton and 8 ton capacities) and the following network of customers with their shipping requirements, starting from location 1. -Using the Clark and Wright savings heuristic, calculate the savings for the paired combinations of delivery nodes 1, 3 and 4.

ADAMS Electricals decided to analyze the job flow of their shop to see if a more effective layout could be designed to reduce average job lead time. They had 6 processing departments in the shop, positioned as shown below. The vertical distance between departments was 30 feet while the horizontal distance was 45 feet. Diagonal moves are not possible. For a typical day, the number of jobs moving from one department to the next was: Based on the total distance matrix developed above, ADAMS Electricals decided to make some changes in their layout so that the modified shop layout is now: -How much distance is traveled by the 7 jobs from Department A to Department F?

For the Buehler Bakery, the desired output for a 8 hour workday is 450 units. The discrete tasks required to produce the product have been identified, timed in seconds, and ordered as indicated in the table. -Considering there are 7 work centers for the assembly line and assuming 1 worker per work center, calculate the total labor work time.

ADAMS Electricals has decided to analyze the job flow of their shop to see if a more effective layout can be designed to reduce average job lead time. They have 6 processing departments in the shop, positioned as shown below. The vertical distance between departments is 30 feet while the horizontal distance is 45 feet. Assume that diagonal moves are not possible. For a typical day, the number of jobs moving from one department to the next is shown in the matrix below. -When a job moves from Department C to Department D, how much distance does the job travel?

Assume a facility is open 8 hours a day and requires an output of 600 units a day. The following tasks must be arranged as an assembly line: -Calculate the minimum number of assembly line work centers.

William is considering a dispatch rule to satisfy more physicians. William requested that each physician put a desired completion time on each request for blood testing. To investigate the effects of changing the dispatch rules, William decides to take the first five requests for blood work from one of the technicians and analyze job completion under various scheduling rules. The following table shows the time to complete blood work on each sample and the time when the physician has requested that it to be complete. -Using the processing order as per the minimum slack per operation (MINSOP), determine the average tardiness.

Assume that all of the jobs below arrived at the same time. Also assume that transfer times are zero and jobs cannot be split -Using the critical ratio (CR) rule, determine the processing order.

Use the Cluster-first-route-second heuristic for two trucks (10 ton and 8 ton capacities) and the following network of customers with their shipping requirements, starting from location 1. -Based on the answer for question 30, the 8 ton truck will handle which tour?