Detailed Scheduling Flashcards

In detailed scheduling, what does 'forward scheduling' mean?

Answer: Scheduling forward from today to find the earliest completion date

Forward scheduling starts from the current date and schedules operations forward to determine the earliest possible completion date.

Which dispatching rule gives priority to the job with the smallest ratio of remaining processing time to remaining slack time?

Answer: Least Slack per Operation (S/OPN)

The Least Slack per Operation rule divides remaining slack by the number of remaining operations to prioritize jobs closest to being late.

A work center has a demonstrated capacity of 400 standard hours per week. If efficiency is 90% and utilization is 80%, what is the rated capacity?

Answer: 288 standard hours

Rated capacity = demonstrated capacity × efficiency × utilization = 400 × 0.90 × 0.80 = 288 standard hours.

What is the primary purpose of a dispatch list in a manufacturing environment?

Answer: To authorize and prioritize work orders at a work center

A dispatch list is a prioritized sequence of work orders released to a work center, telling operators what to work on and in what order.

In finite capacity scheduling, what happens when a work center is overloaded?

Answer: Jobs are rescheduled to alternate periods or resources

Finite scheduling recognizes capacity limits and resolves overloads by moving jobs to different time periods or alternate resources.

Which of the following best describes 'queue time' in a manufacturing routing?

Answer: The time a job waits before being processed at a work center

Queue time is the waiting time a job experiences before actual processing begins at a work center, often the largest component of lead time.

When using the Critical Ratio (CR) dispatching rule, a CR value less than 1.0 indicates:

Answer: The job is behind schedule and at risk of being late

A CR below 1.0 means the time remaining is less than the work remaining, signaling the job is behind schedule and needs priority.