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Transcript of System Design: Process Selection and Facility Layout Pertemuan 07 Mata kuliah: J0444 - Manajemen...
![Page 1: System Design: Process Selection and Facility Layout Pertemuan 07 Mata kuliah: J0444 - Manajemen Operasional Tahun: 2010.](https://reader030.fdocuments.in/reader030/viewer/2022012922/56649e0d5503460f94af733f/html5/thumbnails/1.jpg)
System Design: Process Selection and Facility
LayoutPertemuan 07
Mata kuliah : J0444 - Manajemen OperasionalTahun : 2010
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Learning Objectives
• Explain the strategic importance of process selection.
• Explain the influence that process selection has on an organization.
• Describe the basic processing types. • Discuss automated approaches to processing. • Explain the need for management of
technology.
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Learning Objectives
• List some reasons for redesign of layouts. • Describe the basic layout types. • List the main advantages and disadvantages of
product layouts and process layouts. • Solve simple line-balancing problems. • Develop simple process layouts.
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• Process selection– Deciding on the way production of goods or services
will be organized
• Major implications– Capacity planning– Layout of facilities– Equipment– Design of work systems
Introduction
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Forecasting
Product andService Design
TechnologicalChange
CapacityPlanning
ProcessSelection
Facilities andEquipment
Layout
WorkDesign
Process Selection and System Design
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• Key aspects of process strategy– Capital intensive – equipment/labor
– Process flexibility
– Technology
– Adjust to changes
– Design
– Volume
– technology
Process Strategy
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Technology
• Technology: The application of scientific discoveries to the development and improvement of products and services and operations processes.
• Technology innovation: The discovery and development of new or improved products, services, or processes for producing or providing them.
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Kinds of Technology
• Operations management is primarily concerned with three kinds of technology:– Product and service technology– Process technology– Information technology
• All three have a major impact on:– Costs– Productivity– Competitiveness
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Technology Competitive Advantage
• Innovations in– Products and services
• Cell phones• PDAs• Wireless computing
– Processing technology
• Increasing productivity• Increasing quality• Lowering costs
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Technology Acquisition
• Technology can have benefits but …• Technology risks include:
– What technology will and will not do– Technical issues– Economic issues
• Initial costs, space, cash flow, maintenance• Consultants and/or skilled employees• Integration cost, time resources• Training, safety, job loss
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• Variety– How much
• Flexibility– What degree
• Volume – Expected output
Job Shop
Batch
Repetitive
Continuous
Process Selection
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• Job shop– Small scale
• Batch– Moderate volume
• Repetitive/assembly line– High volumes of standardized goods or services
• Continuous– Very high volumes of non-discrete goods
Process Types
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Process Type
Job Shop Appliance repairEmergency
room
Ineffective
Batch Commercialbaking
ClassroomLecture
Repetitive Automotiveassembly
Automaticcarwash
Continuous(flow)
Ineffective Steel ProductionWater purification
Product and Service Processes
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• Automation: Machinery that has sensing and control devices that enables it to operate– Fixed automation– Programmable automation
• Computer-aided design and manufacturing systems (CAD/CAM)
• Numerically controlled (NC) machines • Robot• Manufacturing cell• Flexible manufacturing systems(FMS)• Computer-integrated manufacturing (CIM)
Automation
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What is Facility Layout
• Location or arrangement of everything within & around buildings
• Objectives are to maximize– Customer satisfaction – Utilization of space, equipment, & people– Efficient flow of information, material, &
people– Employee morale & safety
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Strategic Importance of Layout
Proper layout enables:• Higher utilization of space, equipment,and
people• Improved flow of information, materials, or
people• Improved employee morale and safer working
conditions• Improved customer/client interaction• Flexibility
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Types of Layouts
• Fixed-position layout• Process-oriented layout• Office layout• Retail layout• Warehouse layout• Product-oriented layout
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Six Layout Strategies
• Fixed-position layout– large bulky projects such as ships and buildings
• Process-oriented layout– deals with low-volume, high-variety production (“job
shop”, intermittent production)
• Office layout– positions workers, their equipment, and
spaces/offices to provide for movement of information
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Six Layout Strategies - continued
• Retail/service layout– allocates shelf space and responds to customer
behavior
• Warehouse layout– addresses trade-offs between space and material
handling
• Product-oriented layout– seeks the best personnel and machine use in
repetitive or continuous production
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Layout Example - Office
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Raw materialsor customer
Finished itemStation
2
Station 2
Station 3
Station 3
Station 4
Station 4
Material and/or labor
Station 1
Material and/or labor
Material and/or labor
Material and/or labor
Used for Repetitive or Continuous Processing
Product Layout
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1 2 3 4
5
6
78910
In
Out
Workers
A U-Shaped Production Line
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Dept. A
Dept. B Dept. D
Dept. C
Dept. F
Dept. E
Used for Intermittent processingJob Shop or Batch Processes
Process Layout(functional)
Process Layout
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Requirements of a Good Layout
an understanding of capacity and space requirements
selection of appropriate material handling equipment
decisions regarding environment and aesthetics
identification and understanding of the requirements for information flow
identification of the cost of moving between the various work areas
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Constraints on Layout Objectives
• Product design & volume• Process equipment & capacity• Quality of work life• Building and site
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Areas of Concern in Layout Strategy
LayoutStrategy
MaterialFlow
Communication
WorkCell
Safety
MaterialAttributes
Warehousing
ServiceAreas
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Fixed-Position Layout
• Design is for stationary project • Workers and equipment come to site• Complicating factors
– Limited space at site– Changing material needs
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Process-Oriented Layout• Design places departments with large flows of
material or people together• Department areas having similar processes
located in close proximity– e.g., All x-ray machines in same area
• Used with process-focused processes
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Steps in Developing a Process-Oriented Layout
1 Construct a “from-to matrix”2 Determine space requirements for each
department3 Develop an initial schematic diagram4 Determine the cost of this layout5 By trial-and-error (or more sophisticated
means), try to improve the initial layout6 Prepare a detailed plan that evaluates factors
in addition to transportation cost
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Cost of Process-Oriented Layout
j department and i department
between load a move cost to C
j department toi department
from moved loads ofnumber X
sdepartment individual ji,
sdepartmentor
centers work ofnumber totaln where
CX cost Minimize
ij
ij
n
1i
n
1jijij
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Interdepartmental Flow of Parts1 2 3 4 5 6
1
2
3
4
5
6
50 100 0 0 20
30 50 10 0
20 0 100
50 0
0
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Interdepartmental Flow Graph Showing Number of Weekly Loads
100
50 30
1020
50
20
10050
1 2 3
4 5 6
![Page 33: System Design: Process Selection and Facility Layout Pertemuan 07 Mata kuliah: J0444 - Manajemen Operasional Tahun: 2010.](https://reader030.fdocuments.in/reader030/viewer/2022012922/56649e0d5503460f94af733f/html5/thumbnails/33.jpg)
Possible Layout 1
Assembly
Department
(1)
Printing
Department
(2)
Machine Shop
Department
(3)
Receiving
Department
(4)
Shipping
Department
(5)
Testing
Department
(6)
Room 1 Room 2 Room 2
Room 4 Room 5 Room 6
60’
40’
![Page 34: System Design: Process Selection and Facility Layout Pertemuan 07 Mata kuliah: J0444 - Manajemen Operasional Tahun: 2010.](https://reader030.fdocuments.in/reader030/viewer/2022012922/56649e0d5503460f94af733f/html5/thumbnails/34.jpg)
Interdepartmental Flow Graph Showing Number of Weekly Loads
100
50
30
10
20
50
20 10050
1 2 3
4 5 6
![Page 35: System Design: Process Selection and Facility Layout Pertemuan 07 Mata kuliah: J0444 - Manajemen Operasional Tahun: 2010.](https://reader030.fdocuments.in/reader030/viewer/2022012922/56649e0d5503460f94af733f/html5/thumbnails/35.jpg)
Possible Layout 3
Painting
Department
(2)
Assembly
Department
(1)
Machine Shop
Department
(3)
Receiving
Department
(4)
Shipping
Department
(5)
Testing
Department
(6)
Room 1 Room 2 Room 2
Room 4 Room 5 Room 6
60’
40’
![Page 36: System Design: Process Selection and Facility Layout Pertemuan 07 Mata kuliah: J0444 - Manajemen Operasional Tahun: 2010.](https://reader030.fdocuments.in/reader030/viewer/2022012922/56649e0d5503460f94af733f/html5/thumbnails/36.jpg)
• Cellular Production– Layout in which machines are grouped into a
cell that can process items that have similar processing requirements
• Group Technology– The grouping into part families of items with
similar design or manufacturing characteristics
Cellular Layouts
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Cellular Layout - Work Cells
• Special case of product-oriented layout - in what is ordinarily a process-oriented facility
• Consists of different machines brought together to make a product
• Temporary arrangement only• Example: Assembly line set up to produce
3000 identical parts in a job shop
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Improving Layouts by Moving to the Work Cell Concept
![Page 39: System Design: Process Selection and Facility Layout Pertemuan 07 Mata kuliah: J0444 - Manajemen Operasional Tahun: 2010.](https://reader030.fdocuments.in/reader030/viewer/2022012922/56649e0d5503460f94af733f/html5/thumbnails/39.jpg)
Work Cell Floor Plan
OfficeOffice
Tool RoomTool RoomWork CellWork Cell
SawsSaws DrillsDrills
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Office Layout
Design positions people, equipment, & offices for maximum information flow
Arranged by process or product Example: Payroll dept. is by process
Relationship chart used Examples
Insurance company Software company
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Office Layout Floor Plan
AccountingAccounting
ManagerManager Brand XBrand X
FinanceFinanceFin. Acct.
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Relationship Chart
1 PresidentO
2 Costing UA A
3 Engineering IO
4 President’s Secretary
1122
33
Ordinary closeness: President (1) & Costing (2)
Absolutely necessary: President (1) & Secretary (4)
44
I = Important
U = Unimportant
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Office Relationship Shart
1 President
2 Chief Technology Officer
3 Engineer’s Area
4 Secretary
5 Office entrance
7 Equipment cabinet
8 Photocopy equipment
9 Storage room
9 Storage room
U
I
I
A
U
O
E
I
O
E
I
O
A
O
A
X
O
U
E
A
I
I
E
U
A
I
I
E
A
X
U
U
OOU O
Val. Closeness
A Absolutely necessary
E Especially important
I Important
O Ordinary OK
U Unimportant
X Not desirable
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Retail/Service Layout
Design maximizes product exposure to customers Decision variables
Store flow pattern Allocation of (shelf) space to products
Types Grid design Free-flow design
Video
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Retail /Service Layout -Grid Design
OfficeOffice CartsCarts Check-Check-outout
Grocery StoreGrocery StoreMeatBread
Milk
Pro
du
ceF
roze
n F
oo
ds
![Page 46: System Design: Process Selection and Facility Layout Pertemuan 07 Mata kuliah: J0444 - Manajemen Operasional Tahun: 2010.](https://reader030.fdocuments.in/reader030/viewer/2022012922/56649e0d5503460f94af733f/html5/thumbnails/46.jpg)
Store Layout - with Dairy, Bread, High Drawer Items in Corners
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Retail/Service Layout - Free-Flow Design
FeatureFeature
Display Display TableTable
Trans.Trans.CounterCounter
Apparel StoreApparel Store
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Retail Store Shelf Space Planogram
Computerized tool for shelf-space management
Generated from store’s scanner data on sales
Often supplied by manufacturer
2 ft2 ft..
55 facingsfacings
VO
-5
VO
-5
VO
-5
SU
AV
E
SU
AV
E
VO
-5P
ER
T
PE
RT
PE
RT
PE
RT
PE
RT
VO
-5
![Page 49: System Design: Process Selection and Facility Layout Pertemuan 07 Mata kuliah: J0444 - Manajemen Operasional Tahun: 2010.](https://reader030.fdocuments.in/reader030/viewer/2022012922/56649e0d5503460f94af733f/html5/thumbnails/49.jpg)
A Good Service Layout (Servicescape) Considers
• Ambient conditions - background characteristics such as lighting, sound, smell, and temperature.
• Spatial layout and functionality - which involve customer circulation path planning
• Signs, Symbols, and Artifacts - characteristics of building design that carry social significance
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Warehouse Layout
Design balances space (cube) utilization & handling cost
Similar to process layout Items moved between dock
& various storage areas
Optimum layout depends on Variety of items
stored Number of items picked
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Warehouse Layout Floor Plan
ZonesZones
ConveyorConveyorTruckTruck
Order PickerOrder Picker
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Product-Oriented Layout
• Facility organized around product• Design minimizes line imbalance
– Delay between work stations
• Types: Fabrication line; assembly line
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Product-Oriented Requirements
• Standardized product• High production volume• Stable production quantities• Uniform quality of raw materials &
components
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Line Balancing is the process of assigning tasks to workstations in such a way that the workstations have approximately equal time requirements.
Design Product Layouts: Line Balancing
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Assembly Line Balancing
• Analysis of production lines• Nearly equally divides work between
workstations while meeting required output
• Objectives– Maximize efficiency– Minimize number of
work stations
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Assembly Line BalancingThe General Procedure
• Determine cycle time by taking the demand (or production rate) per day and dividing it into the productive time available per day
• Calculate the theoretical minimum number of work stations by dividing total task time by cycle time
• Perform the line balance and assign specific assembly tasks to each work station
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Assembly Line Balancing Steps
1. Determine tasks (operations)2. Determine sequence3. Draw precedence diagram4. Estimate task times5. Calculate cycle time 6. Calculate number of work stations7. Assign tasks 8. Calculate efficiency
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A B
E H
C
D
F G I10 Min.10 Min.
55
1111
1212
33 77 33
44
1111
Precedence Diagram Example
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Assembly Line Balancing Equations
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Six Station Solution
A B
C
E
D
F G
I
H
10 11
5
3 7
3
1112
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The End