Question 1

A system that "backward schedules" is designed to determine and report the earliest date an order can be completed.

Accepted Answer

Backward scheduling starts with the due date and schedules the last operation first and then works backward to determine the latest start date that can meet the customer's due date, not the earliest completion date.

Question 2

Priority rules are the rules used to obtain a job sequence in production scheduling.

Accepted Answer

Priority rules determine the order in which jobs are scheduled in production, therefore, it is true that priority rules are the rules used to obtain a job sequence in production scheduling.

Question 3

In production scheduling, the process of determining which job to start first on some machine or in some workcenter is known as sequencing or priority sequencing.

Accepted Answer

This is correct. The process of determining which job to start first on a machine or workcenter is known as sequencing or priority sequencing in production scheduling.

Question 4

Under the STR/OP sequencing priority rule, orders with the jobs with the longest STR/OP are run first.

Accepted Answer

Under the STR/OP (Shortest Time Remaining per Operation) sequencing priority rule, orders with the shortest time remaining per operation are run first, not the longest.

Question 5

A shop-floor control system is a system that uses data from the shop floor as well as data processing files to maintain and communicate status information on shop orders and workcenters.

Accepted Answer

A shop-floor control system does use data from the shop floor and data processing files to maintain and communicate status information on shop orders and workcenters.

Question 6

The LCFS and Johnson's priority rules are basically the same except LCFS uses due dates as a major determiner of job sequence.

Accepted Answer

LCFS (Last Come, First Served) prioritizes jobs based on their arrival times, serving the most recently arrived job first, without considering due dates. Johnson's priority rules are used for minimizing the total time needed to complete a set of jobs on two machines, focusing on the order of jobs to optimize processing time, not on arrival times or due dates directly.

Question 7

Using the random order or "whim" priority rule to sequence production jobs means that supervisors or operators select whichever job they feel like running.

Accepted Answer

The statement accurately describes the use of the "whim" priority rule in sequencing production jobs.

Question 8

Theoretically, all schedules are feasible when finite loading is used.

Accepted Answer

With finite loading, the amount of work assigned to a resource does not exceed its capacity, thus making it possible to find a feasible schedule for any given set of tasks. However, this does not mean that all schedules will be optimal or efficient.

Question 9

In infinite loading, no consideration is given directly to whether there is sufficient capacity at the resources required to complete the work, nor is the actual sequence of the work as done by each resource in the workcenter considered.

Accepted Answer

In infinite loading, the focus is on overall capacity rather than the capacity of individual resources, and there is no consideration given to the sequence of work done by each resource.

Question 10

One of the principles of workcenter scheduling is to match workcenter input information to what the worker can actually do.

Accepted Answer

Workcenter scheduling aims to ensure that the input information given to the workers matches their capabilities and resources available. This helps in optimizing the production process and improving efficiency.

Question 11

The assignment method of job sequencing is a special case of the transportation method of linear programming.

Accepted Answer

The assignment method is a type of linear programming method used for job sequencing problems where each job is assigned to a worker or machine. It is a special case of the transportation method where the number of jobs is equal to the number of workers/machines, and the cost matrix represents the time/cost required to complete each job by each worker/machine. Therefore, the statement is true.

Question 12

Initiating performance of scheduled work is commonly termed "dispatching" of orders.

Accepted Answer

Dispatching refers to the initiation of the scheduled work or production process.

Question 13

The objective of Johnson's rule for job sequencing is to minimize flow time from the beginning of the first job until the completion of the last job.

Accepted Answer

Johnson's rule is a method for scheduling jobs on two machines or work centers. The primary objective of this rule is to minimize the total flow time of jobs, which is the time from the beginning of the first job until the completion of the last job. Therefore, the statement is true.

Question 14

Johnson's rule, a priority rule used in sequencing production jobs, is used only in production situations where we are dealing with one machine or one stage of production activity.

Accepted Answer

Johnson's rule is specifically designed for scheduling jobs on two machines or two stages of production activity, not just one. It aims to minimize the total time needed to complete all jobs on both machines.

Question 15

Shop-floor control (or production activity control) can involve expediting late and critical orders.

Accepted Answer

Shop-floor control involves monitoring and managing production activities in real-time, which includes expediting late and critical orders to ensure that they are completed on time.

Question 16

Shop-floor control (or production activity control) can involve reviewing the status and controlling the progress of orders as they are being worked on.

Accepted Answer

Shop-floor control (or production activity control) does involve reviewing the status and controlling the progress of orders as they are being worked on.

Question 17

A backward schedule tells when an order must be started in order to be done by a specific date.

Accepted Answer

A backward schedule involves working backwards from a set deadline to determine when work must begin in order to meet that deadline.

Question 18

One of the principles of workcenter scheduling is that, while certainty of standards, routings, and so forth is not entirely possible in a shop, certainty should always be an objective to work toward.

Accepted Answer

The principle stated in the statement is true. Workcenter scheduling aims to achieve certainty in standards, routings, and other factors as much as possible, even though absolute certainty may not always be attainable in a manufacturing environment.

Question 19

A workcenter is a physical area of the business in which productive resources are organized and work is completed.

Accepted Answer

A workcenter is a physical area or space within a business where work is completed by organized productive resources.

Question 20

In finite loading, no consideration is given directly to whether there is sufficient capacity at the resources required to complete the work, nor is the actual sequence of the work as done by each resource in the workcenter considered.

Accepted Answer

Finite loading involves scheduling jobs only to the extent that resources (machinery, workstations, labor) are available, taking into account the capacity of each resource and the sequence of operations to ensure that no resource is overloaded.

Quiz 22: Workcenter Scheduling