Exam 2 - Chapter 8 Flashcards
Facility layout
this refers to the specific arrangement of the physical facility
Cellular layout
a facility designed based on self contained groups of equipment needed for a producing a particular set of goods or services
Flow-blocking delay vs lack-of-work
Definitely on the exam
delays occur when a work center completes a unit but cannot release it because the in-process storage at the next stage is full
delays occur whenever one stage completes work and no units from the previous stage are awaiting processing.
The purpose of the assembly line balancing:
the purpose is have keep workers to have the same amount of work so there isn’t any delays
Product layout
arrangement based on the sequence of operations that are performed during the manufacturing of a good or delivery
Process layout
consist of a functional grouping of equipment or activities that do similar work.
Assembly line
is a product layout dedicated to combining the components of a good or service that has been created previously.
Assembly line balancing
is a technique to group tasks among workstations so that each workstation has (ideally) the same amount of work.
We need to know three types of information to balance an assembly line:
- the set of tasks to be performed and the time required to perform each task
- the precedence relations among the tasks
- the desired output rate or demand forecast for the assembly line
You can never get a __% balanced assembly line (test question)
100
Throughput
amount of units/product that u can produced in a fixed time
Flow time
amount of time to produce one unit
Cycle time
Interval between the two units
If you want a fast assembly line you need a ____ ______
fast throughput
If you want a slow assembly line you need a ____ _____
slow throughput
Throughput is measured in:
units
________ throughput increase cycle time
Decrease
_______ throughput decrease cycle time
Increase
Decrease throughput ______ cycle time
increase
Increase throughput ______ cycle time
decrease
The longest cycle time is what?
the sum of the task times (past times)
The longest cycle time will give you what?
you the lowest throughput (output)
The shortest cycle time is what?
the longest past time that will give you the highest throughput
Flow Time
is the average time to complete one cycle of a process (time/unit).
Cycle Time
is the interval between two successive outputs (time/unit).
How is throughput and cycle time related?
It is inversely related
Can your assembly time be 100% balanced when you have 1.6 work stations?
No, it cannot be as it has to be an exact integer (1, 2, etc). It can’t have a fraction. If it has a fraction there will be idle time.
What is the inefficiency time?
the total idle time
Why do you want a longest task time first?
test question
because shortest task time is easier to fit in a line
Why do you want a shortest task time first?
test question
so that the idle time is minimized
Make sure you go over the math questions and practice the problems on the slides as it’s going to be on the test
(test)
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