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

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. -The managers decide to balance the line by assigning tasks to workstations to fill up as much task time as possible. Break ties by assigning the longest task first. What task(s) should be assigned at the third workstation?

A tier-two supplier needs to produce 300 coffee pots per 8 hour day. The discrete tasks required to produce a coffee pot have been identified, timed in seconds, and ordered as indicated in the table. -Operations managers and process engineers design a line that contains 5 stations. What is the percentage of idle time?

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 delivery schedule of Vehicle 2.

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. -How much total distance is traveled on a given 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. -Assuming 1 work center per task, what is the minimum takt time?

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. -How much does it cost for the materials that flow between Sections 3 and 5 every day.

The table depicts an assembly line that has been balanced with a task time of 2 minutes. -What is the efficiency of this balance?

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 maximum output per day?

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 flow time.

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 start time for Vehicle 1.

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 queue time.

Given the following information, Use a Gantt chart to schedule the jobs in order 1, 2, 3 and assume that jobs cannot be split. What is the makespan?

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 questions 30 and 31, what is the total tour mileage?

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 4.

Use the Clark and Wright savings heuristic for the following network of customers, starting from location 1. Assume that any diagonal trip must pass through location 5. -For the paired combinations of delivery nodes 1, 2 and 3, calculate the savings.

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: -Considering there are four work centers for the assembly line and assuming 1 worker per work center, calculate the idle time per day.

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. -We swap the positions of Section 1 with Section 6 and keep the position of other sections the same as earlier. Calculate the total trip cost for the modified layout on a given day.

Use the Clark and Wright savings heuristic for the following network of customers, starting from location 1. Assume that any diagonal trip must pass through location 5. -For the paired combinations of delivery nodes 1, 4 and 5, calculate the savings.

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. -How much distance is traveled by the 6 jobs from Department D to Department B?

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: -When a job moves from Department B to Department E, how much distance does the job travel?