Question 1

Job shop scheduling is also known as shop floor control.

Accepted Answer

Job shop scheduling is a type of production planning and control system used in manufacturing that involves scheduling orders or jobs, assigning resources and determining the sequence of operations needed to complete each job on time. It is also known as shop floor control because it involves managing and controlling the activities that take place on the shop floor.

Question 2

Minimizing overtime is one of several objectives that could be considered when constructing a schedule.

Accepted Answer

Minimizing overtime can be a legitimate objective when creating a schedule, but it is not the only one. Other objectives could include maximizing efficiency, ensuring adequate coverage, and accommodating employee preferences.

Question 3

The shortest processing time (SPT)rule is most useful when the job shop is not congested.

Accepted Answer

False

Question 4

Determining the optimal allocation of jobs to machines or workers can be solved using the assignment method of linear programming.

Accepted Answer

The assignment method of linear programming is specifically designed to solve allocation problems such as assigning jobs to machines or workers. Therefore, determining the optimal allocation of jobs to machines or workers can be solved using the assignment method of linear programming.

Question 5

Johnson's rule gives an optimal sequence for jobs processed serially through a two step system.

Accepted Answer

Johnson's rule is a heuristic algorithm used to find an optimal sequence for jobs to be processed through a two-machine system. It schedules jobs in a way that minimizes the total processing time. Therefore, the statement that Johnson's rule gives an optimal sequence for jobs processed serially through a two-step system is true.

Question 6

The sequence in which jobs should be processed is determined using linear programming.

Accepted Answer

Linear programming is a mathematical optimization technique used to maximize or minimize an objective function subject to constraints. While it can be used to optimize the scheduling of jobs, it does not solely determine the sequence in which jobs should be processed. Other methods such as priority scheduling and heuristic algorithms may also be used.

Question 7

The process of prioritizing jobs that have been assigned to a resource is called sequencing.

Accepted Answer

Sequencing is the process of determining the order in which jobs are performed or tasks are completed by a resource, based on priorities and dependencies between the tasks.

Question 8

Sequencing involves determining the order in which jobs are released to the shop floor.

Accepted Answer

The answer of Sequencing involves determining the order in which...

Question 9

The time required for a job to move through the system is referred to as flow time.

Accepted Answer

Flow time refers to the time it takes for a job to move through the entire system, from start to finish.

Question 10

The first-come,first-served (FCFS)sequencing rule should be only used when operating at high levels of capacity.

Accepted Answer

The FCFS sequencing rule can be used in low or high levels of capacity as it only prioritizes tasks based on their arrival time. However, other sequencing rules such as shortest processing time or earliest due date may be more effective in certain situations.

Question 11

Scheduling specifies when labour,equipment and facilities are needed to produce a product.

Accepted Answer

Scheduling involves determining the timing and sequence of activities required to produce a product, including when labour, equipment, and facilities will be needed.

Question 12

The longest processing time (LPT)rule tends to complete larger jobs in-house when subcontracting is anticipated.

Accepted Answer

The LPT rule prioritizes larger jobs with longer processing times, which may make them less suitable for subcontracting. This can lead to these jobs being completed in-house rather than being outsourced to a subcontractor.

Question 13

Managers typically use multiple objectives when constructing a schedule.

Accepted Answer

Managers often have to balance various goals, such as meeting project deadlines, allocating resources efficiently, and managing costs, when creating a schedule. Therefore, it is common for them to use multiple objectives to achieve a comprehensive and effective schedule.

Question 14

The process of assigning work to limited resources is known as scheduling.

Accepted Answer

The answer of The process of assigning work to limited...

Question 15

The wide variety of jobs in a job shop makes scheduling difficult.

Accepted Answer

In a job shop, since each job may have different requirements and processing times, scheduling becomes more complex and challenging compared to a production line where the same sequence of operations is repeated for each product. Therefore, the wide variety of jobs in a job shop makes scheduling difficult.

Question 16

Scheduling is considered the last stage of the planning process.

Accepted Answer

Scheduling involves the allocation of resources and creation of a timeline for implementing the plans that have been developed in the previous stages of the planning process. Therefore, scheduling is considered the final stage of the planning process.

Question 17

Gantt charts show the planned and yet to be completed activities against total activities.

Accepted Answer

The answer of Gantt charts show the planned and yet...

Question 18

Job-shop scheduling is usually performed by skilled machine operators.

Accepted Answer

Job-shop scheduling is typically done by production planners or scheduling software, not necessarily by machine operators.

Question 19

All sequencing rules strive to optimize both processing efficiency and due date performance.

Accepted Answer

The answer of All sequencing rules strive to optimize both...

Question 20

The scheduling function for mass production and job shop production are basically the same.

Accepted Answer

The scheduling function for mass production and job shop production are different. Mass production typically involves producing large quantities of standardized products using assembly line techniques, while job shop production involves producing smaller quantities of customized or unique products using a variety of manufacturing techniques. This requires different scheduling approaches to optimize production efficiency in each type of production.

Quiz 22: Scheduling