warehousing management. part of firms logistics system that stores products at and between point of...
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WAREHOUSING MANAGEMENT
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• Part of firms logistics system that stores products at and between point of origin and point of consumption.
• Term “Warehousing” is referred as transportation at zero miles per hour
• Warehousing provides time and place utility for raw materials, industrial goods, and finished products, allowing firms to use customer service as a dynamic value-adding competitive tool.
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THE ROLE OF THE WAREHOUSE IN THE LOGISTICS SYSTEM
• The warehouse is where the supply chain holds or stores goods.
• Functions of warehousing include– Transportation consolidation– Product mixing– Docking– Service– Protection against contingencies
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TYPE OF WAREHOUSING
• Public Warehousing
• Private Warehousing
• Contract Warehousing
• Multi-client Warehousing
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DESIGN CONSIDERATION
Ideal Facility for Pure Supplier Consolidation(Full Pallet Movement)
Warehouse Space Requirements
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PRINCIPLES OF WAREHOUSE LAYOUT DESIGN
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WAREHOUSE PROCESSPut-away
•Identify Product•Identify Product Location•Move Products•Update Records
Storage•Equipment•Stock Location–Popularity–Unit Size–Cube
Shipping Preparation•Packing•Labeling•Stacking
Order Picking•Information•Walk & Pick•Batch Picking
Shipping•Schedule Carrier•Load Vehicle•Bill of Loading•Record Update
RECEIVING•Schedule Carrier•Unload Vehicle•Inspect for damage
INPUT
OUTPUT
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OBJECTIVES OF EFFICIENT WAREHOUSE OPERATIONS
• Provide timely customer service.
• Keep track of items so they can be found
readily & correctly.
• Minimize the total physical effort & thus the
cost of moving goods into & out of storage.
• Provide communication links with customers
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• Benefits of Warehouse Management– Provide a place to store & protect inventory– Reduce transportation costs– Improve customer service levels
• Complexity of warehouse operation depends on
the number of SKUs handled & the number of
orders received & filled.
• Most activity in a warehouse is material handling.
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• Capital costs
—Costs of space & materials handling
equipment
• Operating costs
—Cost of labor
—Measure of labor productivity is the
number of units that an operator can
move in a day
COSTS OF OPERATING A WAREHOUSE
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WAREHOUSE ACTIVITIES• Receive goods
• Identify the goods
• Dispatch goods to storage
• Hold goods
• Pick goods
• Marshal shipment
• Dispatch shipment
• Operate an information
system
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• Accepts goods from
‒ Outside transportation or attached factory
& accepts responsibility
• Check the goods against an order & the bill
of loading
• Check the quantities
• Check for damage & fill out damage
reports if necessary
• Inspect goods if required
Receive goods
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‒ items are identified with the appropriate
stock-keeping unit (SKU) number (part
number) & the quantity received
recorded
Identify the goods
Dispatch goods to storage‒ goods are sorted & put away
Hold goods
‒ goods are kept in storage & under proper
protection until needed
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Pick goods‒ items required from stock must be
selected from storage & brought to a
marshalling area
Marshal the shipment
‒ goods making up a single order are brought
together & checked for omissions or errors;
order records are updated
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Dispatch the shipment‒ orders are packaged, shipping documents
are prepared, & goods loaded on the
vehicle
Operate an information system
‒ a record must be maintained for each
item in stock showing the quantity on
hand, quantity received, quantity issued,
& location in the warehouse
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Maximize productivity & minimize cost, warehouse management must work with the following• Maximize use of space
– space is the largest capital cost
• Effective use of labor & equipment
– labor is the largest operating cost
– material handling equipment is the
second largest capital cost
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FACTORS INFLUENCING EFFECTIVE USE OF WAREHOUSES
• Cube utilization and accessibility
• Stock location
• Order picking and assembly
• Physical Control & Security - Elements
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Cube utilization and accessibility
‒ Goods stored not just on the floor, but
in the cubic space of the warehouse;
warehouse capacity depends on how
high goods can be stored
‒ Accessibility means being able to get at
the goods wanted with a minimum
amount of work
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Cube utilization and accessibility continued…
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Stock Location• Objectives
– To provide the required customer
service
– To keep track of where items are
stored
– To minimize effort to receive, put
away, and retrieve items
• Basic Stock Locating Systems
– Group functionally related items
together
– Group fast-moving items together
– Group physically similar items
together
– Locate working stock and reserve
stock separately
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• Fixed Location– SKU assigned a permanent location, & no other items are stored
there– Fixed-location systems usually have poor cube utilization– Usually used in small warehouses; throughput is small, & there
are few SKUs
• Floating (Random) Location
– Goods stored wherever there is appropriate space
– Advantage is improved cube utilization
– It requires accurate and up-to-date information
– Warehouses using floating-location systems are usually computer-based
Stock Location
continued…
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Stock Location
continued…• Two other systems sometimes used are
– Point-of-use storage
• Inventory stored close to where it will
be needed
• Used in repetitive manufacturing &
JIT systems
– Central storage
• Contains all inventory in one central
location
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• Advantages of Point-of-use Storage
– Materials are readily accessible to users
– Material handling is reduced or eliminated
– Central storage costs are reduced
– Material is accessible all the time
Stock Location
continued…
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• Advantages of Central Storage
– Ease of control
– Inventory record accuracy is easier to
maintain
– Specialized storage can be used
– Reduced safety stock, since users do not
need to carry their own safety stock
Stock Location
continued…
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Order Picking and Assembly
• When an order is received, items
must be obtained from the
warehouse, grouped, & prepared for
shipment, systems used
– Area system
– Zone system
– Multi-order system
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• Area system
– Order picker circulates throughout warehouse
selecting items on an order -- order is ready to ship
when order picker is finished
• Zone system
– Warehouse is divided into zones, & each picker
works only in an assigned zone -- order is divided
by zone, & the items from each zone are sent to
the marshaling area
Order Picking and Assembly continued…
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• Multi-order system
– Same as the zone system, except that each
picker collects items for a number of orders
at the same time
Order Picking and Assembly continued…
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PHYSICAL CONTROL & SECURITY - ELEMENTS
• Good part numbering system
• Simple, well-documented transaction system– Identify the item– Verify the quantity– Record the transaction– Physically execute the transaction
• Limited access– Inventory must be kept in a safe, secure
(locked) place with limited general access
• Well-trained workforce