determining the best physical arrangement of resources within a facility
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process layouts
grouping similar things together; general purpose and flexible resources, low capital intensity and little automation, high labor intensity, slower processing
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product layout
desinged to produce specific product efficiently; utilizing specialized equipment to make large volumes of one or more products, efficiency, and specialized equipment, widespread use of automation
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using specialized eqipument to transport wip to different operations
product layout
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\ uses general purpose and flexible with low capital intensity and automation
process layout
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hybrid layouts
combine beneficial elements of both layouts by maintaining efficiencies of product layouts and flexibility of process layouts
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fixed position layout
product cannot be moved, uses project management
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office layout
minimizes the cost of information flow
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warehouse layout
focuses on both material handling and ease of access
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retail layout
requires 3d thinking, has implications for customer flow and gross profit
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newport news shipbuilding company is building a new aircraft carrier for the navy
fixed postion
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lawn boy has metal forming and fabrication equipment organized in departments but utilizes special lines to assemble the product
hybrid layout
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maximum output rate
available time / sum of elemental times
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if forecasted demand is greater than max output
assembly line with work stations
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takt time
available demand / forecast demand
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max bottleneck output
available time / bottleneck task timeb
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bottleneck time
longest elemental time in the series
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balking
arriving customer chooses not to enter a queue becuase its already too long
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renegaging
when a customer already in queue goves up and exits without being serviced
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jockeying
when a customer switches back and forth between alternate queues in an effort to reduce time wating
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servers
multiple phase systems requires customers to visit more than one server
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job design
the process of specifying contents for the job
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job design requirementws
purpose, duties and responsibilites, and required credentials
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technical feasibility
describes whether the job is within physical and mental capabilities for the average worker
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economic feasibility
indicates whether the cost of doing the job is less than its added value to the product or service
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behaviroal feasibility
describes whether the job is intrinsically satisfying
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why switch to automation
safety and risk of injury to workers, monotonus, degree of precision, complexity of task, need for empathy, compassion or other emotional elements
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job enlargement
increasing scope of work assigned to a job, enhancing the pride of work and sense of accomplishment of the worker, significant contribution to the product
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job enrichment
increases level of responsibility for work planning or inspection, increasing sense of control and pride
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job rotation
shifts a worker through several jobs to increase understanding of total process, gives job variety, reduces boredom, and reduces repetitive motion risks
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use of teams
increase sense of partnership and can involve small groups
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time study
how long does it take to do it the best way
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method analysis
whats the best way to do something
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standard time
length of time of a qualified worker working at a normal pace following the appropriate SOP using the correct tools and procedure will take to complete a job
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normal time
actual length of time to complete a job adjusted by a performance rating factor
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standard time
includes additional allowances that occur within an average work dat
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work sampling
used to evaluate the time in various job activities when the job is not repetitive
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individual systems
time based salary vs output based incentive systems
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group incentives
profit sharing and gain sharing
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raw materials
coal stockpile at coal company
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components
sparkplugs, wires, clips, bolts
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WIP
lawnmowers partially assembled on assembly line
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finished goods
televisions crated and packed at a warehouse
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distribution inventory
nissan motors has orders on a ship from japan
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maintenance, repair, and operating supplies
lubricating oils, bathroom supplies, and metal stock for repairs
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inventory turnover n
sales / inventory
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which is the hardest cost to measure
shortage costs
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lot for lot
order exactly whats needed
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fixed order quanity
order a predetermined amount each time m
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min max system
when inventory falls to a set minimum level, order up to max levekl
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periodic review
at specified intervals, order up to target level
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reorder point
daily demand \* lead time
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paretos law
use of abc classification
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high volume operations
fixed routings, easy identifiable bottlenecks, line balancing
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low volume operations
job shop operations that are designed for flexibiliy, each product or service have have its own routing
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infinite loading
ignores capacity contraints and loads the stations based on total demand at that station
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finite loading
allows work to be assined at a station only when there is capacity
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forward scheduling
demonstrates the amount of slippage that can be allowed and not be late on the project
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theory of constraints
eli goldratt - optimized production technology
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demand management
appontments and reservations, posted availability, delayed service or backlog
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managing service capacity
staff for peak demand, floating employees or on call, temp, seasonal or part time employees
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project
an endeavor with multiple activities with defined precedence relationships
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activities
specific tasks that must be completed and that require resources
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precedence relationships
a natural order between activities, where some tasks must be completed before others can begin