om lect 04_a(r0-aug08)_facility location & layout_mms_sies
TRANSCRIPT
Facility –Location & Layout
N.K.Agarwal
• Location of facilities involves commitment of resources to a long range plan
• Need for selection of location– Business newly started– Existing business has outgrown the capacity of the original
facilities– Volume of business or extent of market needs establishing
of branches– Lease expires and the landlord does not renew the lease– Other social or economic reasons e.g. Inadequate labour
supply, shifting of markets etc
Plant Location
• Proper selection of location for the plant ensures– An easy and regular supply of
• Raw materials• Labour force
– Efficient plant layout– Proper utilisation of plant production capacity & related cost of
production• Resulting into smooth and efficient working of the organisation
Plant Location
Steps in plant location• National decision (within or outside the country)
– Political stability– Export & import policy– Currency and exchange rate– Cultural & economic peculiarities– Natural environment
• Selection of the region– Availability of raw materials– Nearness to market– Availability of power– Transport facilities– Suitability of climate – Government policy– Competition among states
• Selection of locality or community– Availability of labour– Civic amenities for workers– Existence of complementary & competing industries– Finance & research facilities– Availibility of water and fire fighting services– Local taxes & restrictions– Momentum of an early start– Personal factors
• Selection of exact site– Soil, size & topography– Disposal of waste
Steps in plant location
Off shore location
• Availibility of relatively cheaper labour appears to be a lure to many manufacturers to establish plants in foreign countries
• However, lower productivity of the labour can be a contradicting factor
• Effect of capital productivity needs to be considered also
• Many other costs like cost of materials, fuel, power, equipment, credit, transportation, taxation etc have to be also considered for striking a balance between the various costs for the most economic decision
Plant Layout
• A floor plan for determining and arranging the desired machinery and equipment of a plant
• It permits –The quickest flow of materials in processing the product
•From the receipt of the raw materials to the shipment of the finished product
–At the lowest cost, and –With the least amount of handling
Critical factors
• Materials– Type, availability, provision for storage and movement
• Product– Type i.e. Heavy,light, wet operation (cement), market
demand (decision on machinery type)• Workers
– Male, female (special needs), facilities• Machinery
– Fixed or mobile position of men, machinery, job to decide machinery layout-depending on type, volume of production
Critical factors
• Location– Size and terrain decides type of building– Location decides mode of transportation of raw material and
finished products– Fuel requirement for the plant– Future expansion provision
• Managerial policies– Volume of production and expansion– Extent of automation– Making or buying decision– Rapid delivery to customers– Purchasing policy– Personnel policies
Process layout
• Grouping together of similar machines in one department
• Material moves from one group of machines to the other
• Movement over longer distance and along criss-cross paths
• May also involve part finished inventory waiting
Best suited for intermittent type of production/light and heavy industries
PRODUCTION SUB-SYSTEM
RECEIVING
STORAGE
OPERATION A OPERATION B
OPERATION COPERATION DSHIPPING
INFORMATION FLOWS
INTERMITTENT FLOW PRODUCTION SYSTEM (JOB SHOP )
WIP
WIP WIP
WIP
FINISHED GOODS
EDP CONTROL SYSTEMS
RAW MATERIALS
MATERIAL FLOW
FINISHED GOODS
• Advantages– Reduced investment on machines, being general purpose machines– Greater flexibility in production– Better and more efficient supervision– Greater scope of expansion– Better utilisation of resources– Handling breakdown of equipment easier-jobs can be transferred
to other machines– Full utilisation of machinery
• Limitations– Difficulty in movement of materials– Layout requires more space– Difficulty in production control– Production time increased because of extra travel– Accumulation of work-in-process at different machines
Process layout
Product layout
• Machines arranged in a line depending upon sequence of operations
• Material moves in a line from the first machine to the finished product on the last machine.
• Investment higher as compared to process layout
Better suited for standardised products on a mass scale production. Ex chemicals,paper
FINISHED GOODS
MATERIAL FLOW
RAW MATERIALS
PRODUCTION SUB-SYSTEM
RECEIVING
STORAGE
OPERATION A
OPERATION B
OPERATION C
OPERATION D
SHIPPING
EDP CONTROL SYSTEMS
INFORMATION FLOWS
CONTINUOUS FLOW PRODUCTION SYSTEM (FLOW SHOP)
• Advantages– Reduction in material handling cost due to mechanisation– Layout avoids production bottlenecks– Economy in manufacturing time– Better production control– Requires less floor area per unit of production– Work-in-progress in reduced– Early detection of mistakes
• Limitations– Layout inflexible– Layout expensive– Difficulty in supervision– Expansion is difficult– Any breakdown along the line can disrupt total production
Product layout
Fixed position layout
• Movement of men & machinery to the product• Product remains stationary
– Cost of moving product is high,being bulky• Advantages
– Men/machinery can be moved for a wide variety of operations producing different products
• Worker identifies himself with the product & takes pride when the work is completed
• Investment on layout is small• High cost & difficulty in transporting a bulky job avoided
Best suited for bulky & heavy products ex.Ships, aero planes etc.
AIRCRAFT ASSEMBLYFINISHED PRODUCT (AIRCRAFT)
RAW MATERIALS
MACHINE & EQUIPMENT
LABOUR
FIXED POSITION OR STATIC LAYOUT
Cellular manufacturing (CM) layout
• Grouping of machines into cells • Cells function somewhat like product layout within a
larger shop or process layout• Each cell in the cm formed to produce a single part /
a few parts– All with common characteristics which usually requires
similar machines and settings
• Flow of parts within the cell can take many forms
U-Shaped Cell Layout
A
C B
D A
B C
D
C
A D
B C
D A
B
= work station
CM Layout
• Advantages– Lower work-in-process inventories– Reduced material handling costs– Shorter flow times in production– Simplified production planning (men, material etc.)– Overall performance often increases by lowering production
costs & improving on-time delivery– Improved quality
• Limitations– Reduced manufacturing flexibility & potentially increased machine
downtime– Duplicate pieces of machinery may be needed so as to avoid
movement of parts between cells
Combined layout
• Combination of product & process layout with an emphasis on either
• Generally adopted in industry• In fabrication plants including assembly, fabrication
tends to employ process layout while assembly areas employ product layout
• It is the layout that produces the desired volumes of products at least total cost
F.P.
F.P.
G.C.
G.C.
G.C.
H.T.
H.T.
G.G.
G.G.
RAW MATERIAL
RAW MATERIAL
PR
OC
ES
S L
AY
OU
T
FINISHED PRODUCTS (GEARS)
F.P. = FORGING PRESS G.C. = GEAR CUTTING
H.T. = HEAT TREATMENT FURNACE G.G. = GEAR GRINDING MACHINE
COMBINATION LAYOUT OR HYBRID LAYOUT FOR GEAR MANUFACTURING
PRODUCT LAYOUT
• Generally, as in manufacturing– Line layout preferred in high volume, standardised products
• Fast food service– Process layout preferred in service operations also
• General offices, banks, general hospitals, municipal offices etc.
Service facility layout
SERVICE WAITING LINE MODULES
SINGLE CHANNEL, SINGLE PHASE MODULE
WAITING LINE SERVICE FACILITY
MULTIPLE CHANNEL, SINGLE PHASE MODULE
SERVICE FACILITY
WAITING LINE
SINGLE CHANNEL, MULTIPLE PHASE MODULE
WAITING LINE SERVICE FACILITY
SERVICE FACILITY
WAITING LINE
MULTIPLE CHANNEL, MULTIPLE PHASE MODULE
Plant Layouts
• Plant layout has to provide for other facilities also– Location for receiving and shipping departments– Storage – Inspection– Maintenance– Employee facilities– Others, as applicable to various plants
• Power generators
• Water treatment plants
• Oil tankers
• Compressed air, Chilled water plants etc.
Layout Planning-Methodology
• Travel chart method• Load-distance analysis method• Systematic layout planning method• Analysing layouts with computers
– ALDEP(Automated Layout Designing Programme)– CORELAP (COmputerised RElationship Layout Planning)
– CRAFT (Computerised Relative Allocation of Facilities
Technique)
References
• Production &Operations Management: Aswathappa / Bhat
• Modern Production / Operations Management: Buffa / Sarin
Thank you
LOCATION THEORIES
• PRIMARY FACTORS– INDUSTRIAL UNITS MATERIAL ORIENTED IF
THEIR MATERIAL TRANSPORTATION COST TO THE UNIT IS HIGHER
– INDUSTRIAL UNITS MARKET ORIENTED WHEN COST OF TRANSPORTING FINISHED PRODUCTS TO MARKETS IS HIGHER
– CENTRES FLUSH WITH CHEAP AND SKILLED LABOUR PULL INDUSTRIES TOWARDS THEM
LOCATION THEORIES
• SECONDARY FACTORS– SOME OF THESE ATTRACT INDUSTRIES TO
CERTAIN AREAS FROM DIFFERENT PLACES • CALLED AGGLOMERATING FACTORS
– WHEREAS SOME OTHERS CONTRIBUTE TO THEIR DISPERSAL FROM ORIGINAL PLACES
• CALLED DEGGLOMERATING FACTORS
CRITICAL FACTORS
• TYPE OF INDUSTRY– SYNTHETIC
• CONSTITUENT ELEMENTS COMBINING TO MAKE THE FINAL PRODUCT E.G. CHEMICAL INDUSTRY
– ANALYTICAL• CONVERSION OF RAW MATERIALS INTO VARIOUS
ELEMENTS E.G. PETROLEUM INDUSTRY
– CONDITIONING• CHANGING IN SHAPE / FORM OR PHYSICAL PROPERTIES
E.G. FOUNDARY, METAL WORKING INDUSTRY
– EXTRACTIVE• INVOLVING SEPARATION OF ONE ELEMENT FROM THE
OTHER E.G. METAL FROM IRON ORE
– EACH OF ABOVE FURTHER CLASSIFIED INTO• INTERMITTENT INDUSTRIES• CONTINUOUS INDUSTRIES
• IMPORTANT CONSIDERATIONS– ALL MACHINES PLACED AT POINTS DEMANDED BY
SEQUENCE OF OPERATION– NO CROSSING OVER OF ONE LINE WITH THE OTHER– MATERIALS MAY BE FED WHERE THEY ARE
REQUIRED FOR ASSEMBLY BUT NOT NECESSARILY ALL AT ONE POINT
– ALL OPERATIONS INCLUDING ASSEMBLY, TESTING AND PACKING INCLUDED IN THE LINE
PRODUCT LAYOUT
• IMPORTANT CONSIDERATIONS– DISTANCE BETWEEN DEPARTMENTS AS SMALL AS
POSSIBLE
– DEPARTMENTS TO BE LOCATED AS PER SEQUENCE OF OPERATION
– CONVENIENCE FOR INSPECTION AS WELL AS SUPERVISION
PROCESS LAYOUT
• LAYOUT IMPORTANT TO ACHIEVE CLIENT-CUSTOMER GOAL OF FAST SERVICE– FAST SERVICE SUPPORTED BY POINT OF SALE SYSTEM,
SCANNERS, SELF SERVICE TO PROVIDE SPEED AS WELL AS REDUCE COST, ATMs BY BANKS ETC.
• FLOW LINE APPROACH FOLLOWED IN FAST FOOD SERVICE
• PROCESS LINE LAYOUT OCCURS IN MANY SERVICES LIKE MEDICAL CLINICS, OFFICES ETC.
SERVICE FACILITY LAYOUT
1 2
3
45
1 2 3
1 2
34
21
CELL # 3
CELL # 4
CELL # 1 CELL # 2
PRODUCTION OPERATION PRODUCT OR MATERIAL FLOW
CELLULAR MANUFACTURING LAYOUT
PART D
PART Y
PART X
PART A
PART B
3
Group Technology Layout
A
C
B
D
A
B
C
D
C
A
D
B
C
D
A
B
Layout planning
• Need for future revisions caused due to expansions, technological advances, improved layouts etc
• Major criteria for selecting and designing layouts– Material handling cost
• Material handling costs minimised by using mechanised material handling equipments
– Worker effectiveness• Good layout provides workers with a satisfying job and permits
them to work more effectively at the highest skill level
• Good communication system and well placed supporting activity locations important