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inventory
one of a company’s largest assets, so careful management of this asset is an essential business requirement
four categories of inventory
raw materials, work-in-process/progress (WIP), finished goods, and maintenance, repair, and operating (MRO) supplies
raw materials
purchased items/expected materials that are converted via the manufacturing process into components and products
work-in-process
goods in various stages of completion through the plant, spanning from raw material that has been released for initial process up to fully processed material awaiting final inspection
finished goods
items on which all manufacturing operations, including final testing, have been completed
Maintenance, repair and operating (MRO)
items used in support of general operations and maintenance such as material supplies, spare parts, and consumables used in manufacturing process and supporting operations
service inventory
activities carried out in advance of customer’s arrival
facilitating goods
items used to help facilitate service being provided
inventory management
planning and controlling inventories
internal inventory
strategic stock → safety stock → cycle stock
external inventory
pipeline inventory
cycle stock
inventory that company builds to satisfy immediate demand
safety stock
above what is needed to meet anticipated demand
decoupling
separating parts from parent item (buying without planning factor)
strategic stock
additional inventory beyond cycle and safety stock, used for specific purpose or future event and for a defined time period
pipeline inventory (only external)
inventory in transportation network and distribution system
obsolete inventory
stock that is expired, damaged, or no longer needed
MRO supplies
materials you need to run manufacturing or operations and business, do not end up as part of finished product
direct costs
directly traceable to units produced (materials, labor, etc.)
indirect costs
cannot be traced directly to units produced (overhead, MRO, building, etc.)
variable costs
dependent on unit volume produced vary with output level (materials, labor, etc.)
fixed/sunk costs
independent of unit volume produced (building, equipment, rent, etc.)
carrying costs
costs for physically having inventory onsite and for maintaining infrastructure needed to store inventory and secure and insure over time
order costs
labor costs associated with placing order for inventory and cost of receiving the order
hidden costs
unknown costs that occur when there is too much or too little inventory
absolute inventory value
value of inventory at either cost or market value
inventory turnover
number of times that inventory cycles or turns over during the year
periodic review system
inventory levels are reviewed at a set frequency (daily, weekly, etc.)
continuous review system
inventory levels are continuously reviewed and monitored
reorder point (ROP)
Lowest inventory at which the new order must be placed to avoid stockout
fixed time period system
inventory checked in fixed time periods against target inventory level
fixed order quantity system
continuous inventory review system in which same order quantity is used from order to order
economic order quantity (EOQ) model
quantitative decision model based on trade-off between annual inventory order costs and annual inventory carrying costs
individual item purchase price discounts
discounts for ordering larger quantities
multiple item purchase price discount
purchasing a combination of items from a supplier you may be able to take advantage of volume discount based on total volume across all items purchased rather than just an individual item’s volume
transportation freight rate discounts
order large quantities → take advantage of freight discounts, lower per unit cost
ABC system
classifies inventory based on degree of importance
bin system
uses one or two bins to hold quantity of item inventory
base stock level
issues order whenever withdrawal made from inventory
single period inventory model
only ordered for one-time stocking
linear barcodes
series of alternating bars and spaces printed/stamped on parts, containers, labels, other media, representing encoded information that can be read by e readers
2D barcode
graphical image that stores info both horizontally and vertically
radio frequency identification (RFID)
does not require direct line of sight to read tag, information on tag is updatable
RFID material management
goods auto counted/logged as they enter supply warehouse
weeks of supply
(average on-hand inventory) / (average weekly usage)
inventory turns
(cost of goods sold) / (average inventory value)
procurement
process of selecting and vetting suppliers, negotiating contracts, establishing payment terms, and actual purchase of goods and services
purchasing
action of obtaining merchandise, capital equipment, raw materials, services, and MRO in exchange for money or equipment
purchase requisition (PR)
internal document that defines the need for goods or services
purchasing order (PO)
external commercial document issue by the buyer to seller
e procurement
business to business (B2B) purchase and sale of supplies and services over the internet
merchants
wholesalers and retailers who purchase for resale
industrial buyers
takes materials, converts it, then sells it
contracting
acquisition of services
request for information (RFI)
standard business process whose purpose is to collect written information about capabilities of suppliers
request for proposal (RFP)
detailed capabilities document used to determine supplier’s capability of suppliers
request for quote (RFQ)
document used to solicit bids from interest and qualified suppliers for goods and services that the organization needs to obtain
profit leverage effect
decrease in purchasing expenditures directly increases profits before taxes
return on assets effect
high ROA indicates managerial prowess in generating profits and lower spending
high turnover ration
beneficial, company generates sales efficiently to sell
total cost of ownership
sum of all costs associated with every activity in supply stream of product
elements of TCO
quality, service, delivery, price
components of TCO
pre-transaction costs, transaction costs, post-transaction costs
make
producing materials and products internally
buy/outsource
buying materials, components, or products from suppliers instead of or in addition to making them in house
business strategy
strategic importance to company of product or service that is being considered for outsourcing
risks
lower quality, reliability, predictability of outsourced solutions as compared to in-house manufacturing
economic factor
impact of outsourcing on capital expenditures, ROA, and ROA
outsourcing risks
loss of control, increased reliance, need for supplier management
outsourcing benefits
concentrate on core capabilities, reduce staffing, accelerate reengineering, reduce internal manufacturing problems, improve manufacturing flexibility
insourcing
reverting to in-house production when external, quality, delivery, or services do not meet expectations
cosourcing
sharing of process between internal staff and external providers
backward vertical integration
company acquiring one or more suppliers
forward vertical integration
company acquiring one or more customers
centralized purchasing
located at firm’s corporate office, makes all decisions
decentralized purchasing
individual, local purchasing department, making own decisions
hybrid purchasing
centralized use throughout corporation, decentralized purchasing for goods and services used only locally at each facility
tariffs
duties, taxes, and customs imposed by host country for imported or exported goods
non-tariff barriers
quotas, licensing agreements, embargoes, laws/regulations imposed on imports and exports
countertrade
international trade by exchange of goods rather than by currency
import brokers
agents licensed by government regulatory authority to conduct business on behalf of importers for a service fee
import merchants
person or company engaged in purchase or sale of imported commodities for profit
trading companies
buy products in one country and sell indifferent countries with own distribution network
government purchasing
expenditures made in private sector by all levels of government
nonprofit
expenditures made in private sector by all types of nonprofit organizations
bid
proposal or quotation submitted in response to solicitation from community authority
competitive bidding
procurement process in which bids from competing suppliers for right to supply materials to a company
open bid
sealed bids open in full view of all who wish to witness
closed bid
sealed bids opened in presence only of authorized personnel
bid bond
debt secured by bidder for purpose of providing guarantee successful bidder will accept contract once awarded
performance bond
debt secured by bidder for purpose of providing guarantee that work will be on time and meet specifications
payment bond
debt secured by bidder for purpose of providing protection against third part lines not fulfilled by bidder
benchmarking
process of measuring performance of company’s products, services, or process against those of another business considered to be best in industry
sourcing
identifying company that provides needed goods and services
strategic sourcing
comprehensive approach for locating or sourcing key suppliers, high level of expenditure, vital to firm’s success
single sourcing
purchasing from only one supplier
multisourcing
purchasing goods and services from many suppliers
functional products
stable demand, high levels of competition
innovative products
short life cycles, volatile demand, high profit margins, relatively less competition
spend analysis
categorizing and analyzing expenditure data for a purpose of reducing costs, improving efficiency, and monitoring compliance