BU385 Lecture Notes - Lecture 7: Industrial Engineering, Glossary Of Chess, Standard Deviation

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9 Oct 2014
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Chapter 7: Design of Work Systems
Job Design – specifying the content and method of a job
Specialization – focusing on the job to a narrow scope
Job Enlargement – giving a worker a larger portion of the total task
Job Rotation – workers periodically exchange jobs
Job Enrichment – increasing responsibility for planning and coordination
Self-Directed Teams – groups who perform the same function and are empowered to make
certain decisions and changes in their work
Methods Analysis – breaks down the job into a sequence of tasks and elements and improves
it
Process Chart – chart used to examine the overall sequence of an operation by focusing on
movements of the operator or flow of material
Worker-Machine Chart – used to determine portions of a work cycle during which an operator
and equipment are busy or idle
Motion Study – systematic study of the human motions used to perform an operation or task
Motion Economy Principles guidelines for designing motion-efficient work procedures
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Micro-Motion Study – use of motion pictures and slow motion to study motions that otherwise
would be too rapid to analyze
Simo Chart – a cart that shows the elementary motions performed by each hand, side-by-side,
over time
Ergonomics – fitting the job to the worker’s capability
Work Measurement – determining how long it should take to do a job
Standard Time – the amount of time it should take a qualified worker to complete a specified
task, working at a sustainable rate, and using given methods, tools and equipment, raw
materials, and workplace arrangement
Organizations develop standard times in a number of ways:
1. Stopwatch Time Study
2. Predetermined Element Times
3. Work Sampling
Stopwatch Time Study development of a standard time based on observations of one worker
taken over a number of cycles
1. Define the job to be studied, and inform the worker who will be studied
2. Determine the number of cycles to observe
3. Time the job, and rate the worker’s performance
4. Calculate the standard time, allowing for rest periods
The sample size needed to achieve the goal can be determined using:
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