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30 Cards in this Set
- Front
- Back
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_______ ____ are high volume production systems |
assembly lines |
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What is scheduling? |
establishing the timing of the use of equipment, facilities, and employees in an organization |
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What is a technique for a high volume system? |
line balancing is a scheduling technique for high volume systems |
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High volume is the ... |
ultimate planning horizon |
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You are supposed to ________ for medium volume |
plan |
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With medium volume systems you are determining the ____ and when you set up a ______ _______ _____/_______ |
timing reorder point systems MPR |
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Low volume has to deal with ____ products. |
customized |
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What is scheduling? |
scheduling is only a week/day |
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Planning is for a _________ |
month |
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Scheduling is used to establish the ____ of something |
timing |
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What is sequencing? |
the order in which you do things |
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What is a single workcenter? |
this means you are scheduling a resource that can only do things one at a time. |
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With scheduling a single workcenter, the question is... |
what do i do next |
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What is processing time? |
the time that it will take to do something |
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What is scheduled departure? |
deadline |
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What is the formula of flow time? |
Flowtime of period before+ processing time |
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What is a make span? |
The make span of a schedule is how long it takes you to complete the whole schedule from start to finsih |
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_____ is when you will be done with a certain step |
flowtime |
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Flowtime of the last job in the sequence equals... |
sum of processing time. |
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The dynamic rule is... |
updated everytime you make a decision |
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what is the formula of a critical ratio? |
time remaining/work remaining |
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What is critical ratio? |
how much time you have before you overrun the deadline |
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The ___ signal is the most critical |
smallest |
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What is the formula of tardiness in the dynamic rule? |
flow time- due date |
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Can tardiness be negative? |
no. if the calculation is negative, it is written as zero. |
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If the critical ration is less than one, it is... |
going to be late |
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If the ratio is negative, it means that... |
it is late |
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What rule is used when you are scheduling two workstations? |
johnsons rule |
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What is the purpose of johnsons rule? |
minimizes the makespan of the schedule |
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What are the three steps to johnsons rule? |
(1) Select the job with the shortest time any workcenter. If that time refers to the first workcenter, schedule that job first. If that job refers to the second workcenter, schedule that job last. (2) Cross that job off your list. (3) Repeat steps 1 and 2 with remaining data, until all jobs are scheduled. |
