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Definition of
Logistics
物流的定义
There are many different definitions
for logistics in different countries and periods,
and they have always changed with the
development of society. Some definitions are
typical.
The Council of
Logistics Management defined the logistics in 1992
as the process of
planning,
implementing, and controlling the efficient,
effective flow and storage of
goods,
services, and related information from point of
origin to point of consumption
for the
purpose of conforming to customer requirements.
p>
有物流在不同国家和时期的许多不同的定义,他们总是改变了社会的发展。一些定义
是典型的。
物流管理理事会确定的物流于
p>
1992
年,规划的过程中,实施和控制从起点的快速,高
效流动和储存的货物,服务和相关信息消费点,以满足客户的目的要求。
And the definition from the MIT Center
for Transportation & Logistics is that logistics
involves “managing the flow of items,
informat
ion, cash and ideas through the
coordination of supply chain processes
and through the strategic addition of place,
period and pattern values.”
In practice, the terms “logistics” and
“supply chain management” are now used
interchangeably. Actually logistics and
the Supply Chain are equivalent terms, so the
Institute of Logistics (1998) gave the
following definitions:
并从麻省理工学院为中心的运输与物
流的定义是,物流涉及到“项目管理,信息,资
金和想法,通过供应链流程的协调,并通
过战略性补充的地方,周期和模式值的
流。”
在实践中,术语“物流”和“供应链管理”正在互换使用。实际上物流和供应链是等
价的条件,所以物流研究所(
1998
)给出了如下定义:
Logistics is the time
related positioning of resource or the strategic
management of
the total supply chain.
The supply chain is a sequence of events intended
to satisfy a
customer. It can include
procurement, manufacture, distribution, and waste
disposal,
t
ogether with
associated transport, storage and information
technology1.”
In some
developed countries, the productivity had risen
and the total quantities of
products
became saturation in the early 1990s, also there
were many products which
can not be
distributed because of the competition. It was
difficult to develop the
technique as
well. People had to find a new way to solve the
problems. They intend
to expand the
market and reduce the cost through the improvement
of distribution.
It was the initial
concept of logistics.
物流是资源的时间与定位或整个供应链
的战略管理。供应链是旨在满足顾客的事件序
列。它可以包括采购,制造,分销,以及废
物处理,以及相关的运输,仓储和信息技
术
1
< br>“。
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在一
些发达国家,生产力已经上升,总批量的产品成为饱和度在
90
年代初,也有因竞
争而无法散发许多产品。这是难以发展的技术也是如此。人们必须找到
一种新的方式
来解决问题。他们打算扩大市场,并通过分布的改善降低了成本。这是物流
的初步概
念
The
earliest concept of logistics came from
Ar
ch W. Shaw’s ?Some Problems in
Market Distribution? (1915). They
called it “Physical Distribution” (PD) at that
time.
The definition focused mainly on
the distribution.
In the late 1980s
people have already had a general and deep
comprehension about
logistics. PD as a
definition could not characterize the whole frame
of logistics. The
logistics included
not only the physical distribution but also
production logistics,
returned
logistics, material reuse and the contents like
that. Logistics as a suitable
definition occurred instead of PD.
物流的概念最早来自于拱
W. Shaw
的
?
若干问题的市场分布
?
(
1915
)。他们在那个时
< br>候把它称为“物流配送”(
PD
)。的定义中,主要集中
在分布。
在
80
年代后期的人已经有大约物流广泛而深入的理解。帕金森病作为一种定义物流的
整体
框架不能表征。物流不仅包括物流,还生产物流,回收物流,材料再利用和喜欢
的内容。
物流作为一个合适的定义时发生的,而不是帕金森病。
Logistics Engineering means the
management process of choosing the best scheme
under the guidance of theories about
system engineering and planning, managing,
controlling the system with lowest
cost, high efficiency and good customer service
for the purpose of improving economy
profits of the society and enterprises2. In this
definition we also integrate the
logistics and the flow of information as a system
and
regard the process of producing,
distribution, and consumption as a whole activity.
物流工程是指有关系统设计和规划,管理,控制系统,成本最低,效率高,良好的客
p>
户服务,为提高社会和企业
2
的经济利润为
目的的理论的指导下选择最佳方案的管理
过程。在这个定义中,我们还整合了物流和信息
作为一个系统流和把生产,配送的过
程中,和消费的整体活性
Contents and
Characteristics
内容及特点
The object of Logistics engineering is
to solve the problems in logistics system: the
first task is to make system plan and
design with the theory of facility design; and
the second one is to manage and control
logistics system so as to reduce the cost
and improve the efficiency.
物流工程的目的是解决在物流系统中的问题:第一个任务是使系统的规划和设计,设
施设
计的理论,而第二个是管理和控制物流系统,以降低成本,提高效率。
Facility
Design
设施设计
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Facility design has been often used
in industry department such as factory including
layout design, the system design of
materials handling, building design, information
system design and etc.
设施的设计
已在行业主管部门,如被经常使用,包括工厂布局设计,材料处理系统的
设计,建筑设计
,信息系统设计等
Logistics
Management
物流管理
Logistics System
Design
物流系统设计
In external logistics system, the design implies
the decisions about spots of the
networks for materials distribution.
But in internal logistics system, the main target
is
to improve the economy profits of
the production system.
在外部物流系统,设计意味着对网络的物流配送点的决定。但在内部物流系统,主
要目标是提高生产系统的经济利润。
Functions of Logistics
Systems
物流系统的功能
1.
Members in logistics system should collaborate
with the active partners and
integrate
the serial activities of supply chain to improve
the management and
strengthen the
integrated service capability.
2. It is
helpful for building the rapid response system.
The time to prepare and the
cost will
be reduced and the supply chain will accrue. The
enterprise will be more
competitive.
1
。大家在物流系统应与积极的合作伙伴合作,整合供应链的
系列活动,以改善管
理,加强综合服务能力。
2
。它是建立快速反应系统有帮助。准备和成本将降低时间和供应链将拨。该企
业将更
有竞争力
3. A good
logistics system can reduce the level of
organization, work out the
personal
potentiality of the employees, encourage the team
spirit and make sure of
maximization of
the corporate comprehensive interests3. It can
also form the active
corporate culture
oriented by the customer demands and supported by
the
technological innovation.
3
。良好的物流系统可以降低组织化程度,制定出员工的个人
潜力,鼓励团队合作精
神,并确保企业的综合权益
3
的最大化。它也可以形成积极的企业文化由客户需求为
导向,以技术创新支
撑。
Significance of
Logistics.
物流的意义。
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The theory of logistics
engineering is the study of analyzing, designing,
optimizing
and controlling the
logistics system as a whole. It utilizes the
methods of the
industrial engineering
and system engineering. The study of logistics is
of great
importance in the production
practice.
It can cutback the
appropriation of labor, reduce the labor
intensity, shorten the
production cycle
and accelerate the capital turnover. It also can
reduce the cost and
the circulating
capital appropriation, raise the profits and
economic efficiency, and
improve the
product quality and the competitiveness of the
enterprise.
物流工程的理论分析,设计,优化和控制的物流系统作为一个
整体的研究。它利用工
业工程和系统工程的方法。物流的研究是非常重要的,在生产实践
。
它可以削减劳动力的分配,减轻了劳动强度,缩短了生产周
期,加快资金周转。它也
可以降低成本和流动资金占用,提高利润和经济效益,提高产品
质量和企业的竞争
力。
Notes
1. “Logistics is
the time
related positioning of resource or the strategic
management
of the total supply chain.
The supply chain is a sequence of events intended
to
satisfy a customer. It can include
procurement, manufacture, distribution, and waste
disposal, together with associated
transport, storage and information
technology.
”
句意:物流是关于时间的资源配置或者总供应链的战略管理。
供应链是满足顾客的事
件序列。
它可能包括采购、制造、配送、废物处理、以及相伴随的运输
,
存贮和信息
技术。
Logistics Engineering means the
management process of choosing the best scheme
under the guidance of theories about
system engineering and planning, managing,
controlling the system with lowest
cost, high efficiency and good customer service
for the purpose of improving economy
profits of the society and enterprises.
句意:物流工程是指为了改善社会和企业的经济效益,在关于
系统工程理论的指导下
选择最优的方案、以最低的成本、最高的效率和最好的客户服务规
划、管理和控制系
统的管理过程。
3. A good logistics system can reduce the level of
organization, work out the
personal
potentiality of the employees, encourage the team
spirit and make sure of
maximization of
the corporate comprehensive interests.
句意:一个好的物流系统可以减少管理的层次,发挥员工的个人潜能,激发团队精神
p>
以及确保企业综合利益的最大化。
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Unit 2 Inventory Management
单元
2
库存管理
Inventory decisions are high risk and
high impact for supply chain management.
Inventory committed to support future
sales drives a number of anticipatory supply
chain activities. Without a proper
inventory assortment lost sales and customer
dissatisfaction may occur. Likewise,
inventory planning is critical to manufacturing.
Material or component shortages can
shut down a manufacturing line or force
modification of a production schedule,
which creates added cost and potential
finished goods shortages. Just as
shortages can disrupt planned marketing and
manufacturing operations, inventory
overstocks also create operating problems.
Overstocks increase cost and reduce
profitability as a result of added warehousing,
working capital, insurance, taxes, and
obsolescence. Management of inventory
resources requires an understanding of
the principles, cost, impact, and dynamics.
库存决策是高风险和供应链管理的高冲击。库存致力于支持未来的销售带动了一些预
期性的供应链活动。如果没有适当的库存品种销售损失和可能出现的客户不满。同
样,库存规划是制造中的关键。材料或元件短缺可以关闭一条生产线或力调整的生产
进
度,从而产生额外成本和潜在的制成品短缺。正如短缺可能破坏计划的营销和制造
业务,
库存积压也产生操作问题。存货过多增加成本,降低盈利能力的增加仓储的结
果,营运资
金,保险,税收,和报废。库存资源的管理需要的原则,成本,影响和动
态的理解
Inventory
Risk
存货风险
Inventory management is risky, and risk
varies depending upon a f
irm’s position
in
the distribution channel. The
typical measures of inventory commitment are time
duration, depth, and width of
commitment.
For a manufacturer,
inventory risk is long term. The manufacturer’s
inventory
commitment starts with raw
material and component parts, includes work-in-
process,
and ends with finished goods.
In addition, finished goods are often positioned
in
warehouses in anticipation of
customer demand. In some situations, manufacturers
are required to consign inventory to
customer facilities. In effect, this practice
shifts
all inventory risk to the
manufacturer. Although a manufacturer typically
has a
narrower product line than a
retailer or wholesaler, the manufacturer's
inventory
commitment is deep and of
long duration.
库存管理是有风险的,而且风险取决于在分销渠道坚
定的立场各不相同。存货承诺的
典型措施是持续时间,深度和宽度的承诺。
对于一个制造商,库存风险是长期的。制造商的库存方面的承诺始于原材料
和零部
件,包括工作进程,并与制成品结束。此外,成品通常放置在仓库的预期客户的需
求。在某些情况下,生产商须委托库存,以客户的设施。实际上,这种做法转移所有
p>
库存风险,制造商。虽然制造商通常具有更窄的产品线比零售商或批发商,制造商的
库存方面的承诺深,持续时间长和。
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< br>.
A wholesaler purchases large
quantities from manufacturers and sells smaller
quantities to retailers. The economic
justification of a wholesaler is the capability to
provide retail customers with assorted
merchandise from different manufacturers in
specific quantifies. When products are
seasonal, the wholesaler may be required to
take an inventory position far in
advance of the selling season, thus increasing
depth
and duration of risk. One of the
greatest challenges of wholesaling is product-line
expansion to the point where the width
of inventory risk approaches that of the
retailer while depth and duration of
risk remain characteristic of traditional
wholesaling1. In recent years, retail
clientele have also forced a substantial increase
in depth and duration by shifting
inventory responsibility back to wholesalers.
一个批发商采购大量的生产商及销售较少量给零售商。批发商的经济理由是有能力提
供零售客户提供从特定量词不同厂家生产的各种商品。当产品是季节性的,而批发商
< br>可能需要采取的存货状况远远提前销售季节,从而增加深度和风险的持续时间。其中
一个批发的最大挑战是产品线扩展到存货风险的宽度接近的零售商,同时深入和风险
的
持续时间保持传统
wholesaling1
的特征点。近年来
,零售客户也被迫在深度和持续
时间大幅增加通过转移库存责任推回给批发商
For a retailer, inventory
management is about buying and selling velocity.
The
retailer purchases a wide variety
of products and assumes a substantial risk in the
marketing process. Retailer inventory
risk can be viewed as wide but not deep. Due
to the high cost of store location,
retailers place prime emphasis on inventory
turnover and direct product
profitability. Inventory turnover is a measure of
inventory velocity and is calculated as
the ratio of annual sales divided by average
inventory.
对于零售商的库存管理是关于购买和
销售速度。零售商购买了各种各样的产品,并假
定在营销过程中的重大风险。零售商库存
风险可以被看作是宽,但不深。由于店面选
址成本高,零售商把总理强调存货周转率和直
接产品盈利能力。存货周转率是库存速
度的度量,计算公式为年销售额以平均存货除以比
例
If a business plans to
operate at more than one level of the distribution
channel, it
must be prepared to assume
related inventory risk. For example, the food
chain that
operates a regional
warehouse assumes risk related to the wholesaler
operation over
and above the normal
retail operations. To the extent that an
enterprise becomes
vertically
integrated, inventory must be managed at all
levels of the supply chain.
如果一个企业计划在分销
渠道的多个级别来操作,它必须准备承担相关的库存风险。
例如,经营区域仓库食物链承
担相关风险,并在正常的零售业务上的批发商操作。在
某种程度上,企业成为垂直整合,
库存必须在各级供应链的管理
Inventory
Functionality
库存功能
From an inventory perspective, the
ideal situation would be a response capability to
manufacture products to customer
specification. While a zero-inventory
manufacturing/ distribution system is
typically not attainable, it is important to
remember that each dollar invested is a
trade-off with an alternative use of assets
that may provide a better return
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从库存的角度来看,理想的情况是一个应变能力,以制造
产品,以客户的规格。虽然
是零存货的生产
/
< br>配送系统通常是不能达到的,但要记住,每一个美元的投资是一个权
衡以其他方式
使用资产可能会提供一个更好的回报是很重要的
Inventory is a major asset that should
provide return for the capital invested. The
return on inventory investments is the
marginal profit on sales that would not occur
without inventory. Accounting experts
have long recognized that measuring the true
cost and benefits of inventory on the
corporate profit-and-loss is difficult. Lack of
measurement sophistication makes it
difficult to evaluate the trade-offs among
service levels, operating efficiencies,
and inventory levels. While aggregate inventory
levels have been decreased, many
enterprises still carry an average inventory that
exceeds their basic requirements. This
generalization can be understood better
through a review of the four prime
functions of inventory.
库存是应该提供回报的投资资本的
主要资产。存货投资的回报是销售就不会发生,没
有库存的边际利润。会计专家早就认识
到,衡量的真实成本和企业利润和存货损失利
益是困难的。缺乏测量的复杂性使得很难评
估取舍之间的服务水平,运营效率和库存
水平。虽然总库存水平已经下降,许多企业仍然
携带的平均库存超过他们的基本要
求。这一概括可以通过存货的四个首要职能进行审查被
更好地理解。
Geographical
Specialization
地理专业
Allow geographical positioning across
multiple manufacturing and distributive units of
an enterprise. Inventory maintained at
different locations and stages of the
value-
creation process allows
specialization.
允许跨多个生产地域的定位和企业的分配单位。库存
维持在价值创造过程中的不同位
置和阶段允许专业化。
Decoupling
解耦
Allows economy of scale within a single
facility and permits each process to operate
at maximum efficiency rather than
having the speed of the entire process
constrained by the slowest.
允许经济规模内的单个设备,并允许每个进程以最高效
率,而不是由最慢的约束,整个过
程的速度来操作
Supply/Demand Balanc
ing
供应
/
需求平衡
Accommodate elapsed time between
inventory availability (manufacturing, growing,
or extraction) and consumption
适应可用库存之间经过的时间(制造,种植,或提取)和消费
Buffering
Uncertainty
缓冲不确定性
Accommodates uncertainty related to
demand in excess of forecast or unexpected
delays in order receipt and order
processing on delivery and is typically referred
to as
safety stock.
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These four functions require
inventory investment to achieve managerial
operating
objectives. Given a specific
manufacturing/marketing strategy, inventories
planned
and committed to operations can
only be reduced to a level consistent with
performing the four inventory
functions2. All inventories exceeding the minimum
level are excess commitments.
可容纳的不确定性超出预测或在收到订单和订单处理交货和意外延误,要求有关,通
常被称为安全库存。
这四个函
数需要的库存投资,以实现管理的经营目标。给出了具体的生产
/
营销策
略,库存计划,并承诺操作只能降低到与执行四个盘点
functions2
相一致的水平。所
有存货,超出最低水平
是多余的承诺。
At the minimum
level, inventory invested to achieve geographical
specialization and
decoupling can only
be modified by changes in facility location and
operational
processes of the
enterprise. The minimum level of inventory
required to balance
supply and demand
depends on the difficult task of estimating
seasonal
requirements. With accumulated
experience over a number of seasonal periods, the
inventory required to achieve marginal
sales during periods of high demand can be
projected fairly well. A seasonal
inventory plan can be formulated based upon this
experience.
在最低水平,库存投资,以实现地域
专业化和去耦只能通过在工厂的位置和改变企业
的运作流程进行修改。平衡供给和需求所
需存货的最低水平取决于估算季节性需求的
艰巨任务。随着经验积累了一些季节性的周期
,在高需求期间实现边际销售所需的库
存可以预测得相当好。季节性的库存计划可以制定
基于这方面的经验
Inventories
committed to safety stocks represent the greatest
potential for improved
logistical
performance. These commitments are operational in
nature and can be
adjusted rapidly in
the event of an error or policy change. A variety
of techniques are
available to assist
management in planning safety stock commitments.
The focus in
the balance of this
chapter is on a thorough analysis of safety stock
relationships and
policy formulation.
致力于安全库存存货指为改善后勤性能的最大潜力。这些承诺是业务性质,可以在发
p>
生错误或政策变化时迅速作出调整。多种技术可用来协助管理规划安全库存的承诺。
本章平衡的重点是对安全库存的关系和政策制定的透彻分析
Inventory management is a major element
of logistical strategy that must be
integrated to meet service objectives.
While one strategy to achieve a high service
level is to increase inventory, other
alternative approaches are the use of fast
transportation and collaboration with
customers and service providers to reduce
uncertainty.
库存管理是物流战略,必须整合,
以满足服务目标的一个重要组成部分。虽然有一个
策略,实现了较高的服务水平是增加库
存,其他替代方法是使用快速交通和与客户合
作和服务供应商,以降低不确定性。
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Inventory
Planning
库存计划
Key
parameters and procedures, namely, when to order,
how much to order, and
inventory
control, guide inventory planning. The when-to-
order is determined by the
demand and
performance average and variation. The how much to
order is
determined by the order
quantity. Inventory control determines the process
for
monitoring inventory status.
关键参数和程序,即当订购,订购多少,库存控制,引导库存计划。的时候到顺序是
< br>由需求和性能平均和变化来确定。该订购多少由订货量决定的。库存控制决定了过程
监控库存状态。
Determining When to
Order
确定何时订购
The
reorder point defines when a replenishment
shipment should be initiated. A
reorder
point can be specified in terms of units or days'
supply. This discussion
focuses on
determining reorder points under conditions of
demand and performance
cycle certainty.
The basic reorder point formula
is:
R=D×
T
where R
= Reorder point in units;
D=
Average daily demand in units; and
T = Average performance cycle length in days.
订货点时,定义一个补充货物应启动。再订购点可以以单位或天的供应量来指定。本
次讨论的重点是确定需求和绩效周期的确定性条件下的再订货点。
基本订货点计算公式为:
R =?
×
T
在单元式中
R=
再订购点
;
D =
平均日需求量单位
;
和
T
=
天数平均绩效周期的长度
To
illustrate this calculation, assume demand of 20
units/day and a 10-day
performance
cycle. In this case
R =D×
T
= 20
units/day ×
10 days
= 200 units.
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An
alternative form is to define reorder point in
terms of days of supply. For the
above
example, the days of supply reorder point are 10
days.
The use of reorder point
formulations implies that the replenishment
shipment will
arrive as scheduled. When
uncertainty exists in either demand or performance
cycle
length, safety stock is required.
When safety stock is necessary to accommodate
uncertainty, the reorder point formula
is:
R =D×
T+SS
where SS = Safety stock in units.
为了说明这个计算,假设
20
台
< br>/
天,
10
天的循环性能的需求
。在这种情况下
R
=?
×
T
=20
单位
/
日×
10
天
=200
个单位。
另一种形式是确定订货点的供应天数计算。对于上面的例子,供应订货点的日子是
10
天。
采用订货点的配方意味着如期补充货物将到达。当不确定性存在于无论是需求还是
性能周期长,安全库存是必需的。当安全库存是必要的,以适应不确定性,订货点计
算公式为:
R
=
直径×
T + SS
其中
SS=
安全库存的单位
Determining How Much to
Ordervv
确定订购多少
Lot sizing balances inventory carrying cost with
the cost of ordering. The key to
understanding the relationship is to
remember that average inventory is equal to
one-half the order quantity. Therefore,
the greater the order quantity is, the larger
the average inventory is and,
consequently, the greater the annual carrying cost
is.
However, the larger the order
quantity, the fewer orders required per planning
period and, consequently, the lower the
total ordering cost. Lot quantity formulations
identify the precise quantities at
which the annual combined total inventory carrying
and ordering cost is lowest for a given
sales volume. Figure 6.1 illustrates the basic
relationships. The point at which the
sum of ordering and carrying cost is minimized
represents the lowest total cost.
Simply stated, the objectives are to identify the
ordering quantity that minimizes the
total inventory carrying and ordering cost.
批量结余库存持有成本,订货成本。理解的关键关系是要记住,平均存货等于一半的
< br>订单数量。因此,更大的订单数量,较大的平均库存,因此,更大的每年的持有成本
是。然而,订单数量,每个规划期所需要的订单少了较大的,因此,较低的总订购成
本
。很多数量的配方确定精确的数量在该年度合并总库存账和订货成本是最低的一个
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给定的销量。图
6.1
说
明了基本的关系。在此订购和持有成本的总和最小的点代表了
最低的总成本。简单地说,
目标是确定最小化总库存账和订货成本订货量
Economic Order Quantity (EOQ)
经济订货量(
EOQ
)
The EOQ is the replenishment
practice that minimizes the combined inventory
carrying and ordering cost.
Identification of such a quantity assumes that
demand
and costs are relatively stable
throughout the year. Since EOQ is calculated on an
individual product basis, the basic
formulation does not consider the impact of joint
ordering of products.
The most efficient method for calculating EOQ is
mathematical. For example a
policy
dilemma regarding whether to order 100, 200, or
600 units was discussed.
The answer can
be found by calculating the applicable EOQ for the
situation. Table
6.1 contains the
necessary information.
该
EOQ<
/p>
是补水的做法,最大限度地减少了组合账面库存和订货成本。这样一个数量的
鉴定假定需求和成本相对稳定贯穿全年。由于
EOQ
计算在个别产品的基础上,基本配
方不考虑产品联合订货的影响。
用于计算
EOQ
最有效的方法是数学。例如关于是否命令
100
的政策两难,
200
,
或
600
个单位进行了讨论。答案可以通过计算的情况适用的
EOQ
找到。表
6.1
包含了
必要的信息。
To benefit
from the most economical purchase arrangement,
orders should be placed
in the quantity
of 300 units rather than 100, 200, or 600. An EOQ
of 300 implies that
additional
inventory in the form of base stock has been
introduced into the system.
While the
EOQ model determines the optimal replenishment
quantity, it does require
some rather
stringent assumptions. The major assumptions of
the simple EOQ model
are:
从
最经济的采购安排中获益,订单应放置在
300
个单位的数量,
而不是
100
,
200
或
600
。
300
一个
EOQ
意味着,在基料的形式额外清单已被
引入到系统中。
而
EOQ
模型确定最佳补货数量,它确实需要一些相当严格的假设。简单的
EOQ
模型
的主要假设如下:
(1)All demand is satisfied;
(2) Rate of demand is continuous,
constant, and known;
(3) Replenishment
performance cycle time is constant and known;
(4) There is a constant price of
product that is independent of order quantity or
time;
(5) There is an
infinite planning horizon;
(6) There
is no interaction between multiple items of
inventory;
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(7) No
inventory is in transit; and
(8) No
limit is placed on capital availability.
(
1
)所有的需求得到满足
; <
/p>
(
2
)速度的需求是连续的,不断的,和
已知的
;
(
3
)补充绩效周期时间是恒定且已知
;
(
4
)有产品,它是独立的订单数量或时间的不变价
;
p>
(
5
)有一个无限的计划范围
;
(
6
)有库存的多个项
目之间不存在交互作用
;
(
7
)无库存在途
;
和
(
8
)没有限制放在资本的可用性。<
/p>
The constraints imposed by
some of these assumptions can be overcome
through computational extensions;
however, the EOQ concept illustrates the
importance of the trade-offs associated
with inventory carrying and
replenishment ordering cost.
Relationships involving the inventory
performance cycle, inventory cost, and
economic order formulations are useful
for guiding inventory planning. First,
the EOQ is found at the point where
annualized order cost and inventory
carrying cost are equal. Second,
average base inventory equals one-half
order quantity. Third, the value of the
inventory unit, all other things being
equal, will have a direct relationship
with replenishment order frequency. In
effect, the higher the product value,
the more frequently it will be ordered.
一些这些假设所施加的约束可以通过计算扩展来克服,但是,
EOQ
< br>概念说明
与账面库存和补货订货成本相关联的权衡的重要性。
涉及存货绩效周期,库存成本和经济秩序配方的关系是指导库存计划非常有
用。首先,经济订货批量是点在哪里年度订单成本和库存持有成本是相等的发现。
第二,平均基本存货等于一半订货量。三,库存单位的价值,所有其他的事情都是
平等的,将与补货订单的频率有直接的关系。实际上,产品价值越高,越频繁,它
会
被排序
Inventory Management
Policies
库存管理策略
Inventory management is the process
that implements inventory policy. The
reactive or pull inventory approach
uses customer demand to pull product
through the distribution channel. An
alternative philosophy is a planning
approach that proactively allocates
inventory based on forecasted demand and
product philosophy.
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库存管理是实现库存策略的过程。无功或拉清单的方法是使用客户的需求通过分销
渠道来拉动产品。另一种哲学是一种规划方法,积极主动地分配库存根据预测需求
和产品理念。
Inventory
Control
库存控制
Inventory control is the managerial procedure for
implementing an
inventory policy. The
accountability aspect of control measures units on
hand at a specific location and tracks
additions and deletions. Accountability
and tracking can be performed on a
manual or computerized basis.
Inventory control defines how often inventory
levels are reviewed to
determine when
and how much to order. It is performed on either a
perpetual or a periodic basis.
< br>库存控制是管理程序,用于实现存货政策。控制措施的单位手在一个特定的位
置问
责方面并跟踪增删。问责制和跟踪可以在手动或电脑的基础上进行的。
库存控制定义了多久库存水平进行审查,以确定何时以
及订购多少。这是在任
何一个永久或定期进行。
Perpetual
Review
永久的评论
A
perpetual inventory control process reviews
inventory status daily to
determine
inventory replenishment needs. To utilize
perpetual review, accurate
tracking of
all SKUs (Stock Keeping Units) is necessary.
Perpetual review is
implemented through
a reorder point and order quantity.
永续盘
存控制过程的评论库存状态每天来确定库存补货的需求。利用永久审查,所
有的
SKU
(库存单位)的精确跟踪是必要的。永久复审通过订货点和订货量
来实现
Periodic
Review
定期审查
Periodic inventory control reviews the inventory
status of an item at regular
time
intervals such as weekly or monthly. For periodic
review, the basic recorder
point must
be adjusted to consider the extended intervals
between reviews.
定期库存控制在一定的时间间隔,如每周或每月的
评论项目的库存状态。定期审
查,基本记录点必须进行调整,以考虑评价之间的时间间隔
延长
Summary
总结
Inventory typically represents the
second largest component of logistics cost next
to transportation. The risks associated
with holding inventory increase as
products move down the supply chain
closer to the customer because the
potential of having the product in the
wrong place or form increases and costs
have been incurred to move the product
down the channel3. Further, the cost of
carrying inventory is significantly
influenced by the cost of the capital tied up in
the inventory. Geographic
specialization, decoupling, supply/demand
balancing,
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and
buffering uncertainty provide the basic rationale
for maintaining inventory.
While there
is substantial interest in reducing overall supply
chain inventory,
inventory does add
value and can result in lower overall supply chain
costs with
appropriate trade-offs.
库存通常代表物流成本旁,交通的第二大组成部分。与持有存货的增加作为产品的
供应链下移更贴近客户,因为其在错误的地方或形式的增加和成本的产品的潜力已
发生移动产品向下通道
3
的相关风险。此外,存货持有成本通
过捆绑在库存资金的
成本显著影响。地理专业化,解耦,供应
/
需求平衡和缓冲的不确定性提供了基本
的理由维持库存。虽然在
降低整体供应链库存极大的兴趣,库存确实增加价值,并
能产生适当的取舍降低整体供应
链成本
One of the greatest
challenges of wholesaling is product-line
expansion to the
point where the width
of inventory risk approaches that of the retailer
while
depth and duration of risk remain
characteristic of traditional wholesaling.
句意:批发业最大的挑战之一就是产品线扩展到一定程度,这
时库存风险的宽
度达到与零售商相同,而风险的深度和持续时间仍保持传统批发业的特征
。
2. Given a specific
manufacturing/marketing strategy, inventories
planned
and committed to operations can
only be reduced to a level consistent with
performing the four inventory
functions.
句意:
<
/p>
对于一个特定的生产或者营销策略,规划的库存和参与运转的库存只能
减少到和履行库存的四个基本职能相一致的水平。
3.
The risks associated with holding inventory
increase as products move
down the
supply chain closer to the customer because the
potential of having
the product in the
wrong place or form increases and costs have been
incurred to move the product down the
channel.
句意:
随着产品沿着供应链越来越靠近地向消费者移动,与持有库存相关的风
险增长,这是因为产品处于错误的位置或者形式的潜在可能性增长和产品在配
送渠道中附
加了成本。
Unit 3 Procurement and
Warehousing
采购与仓储
Every organization, whether it is a
manufacturer, wholesaler, or retailer, buys
materials, services, and supplies from
outside suppliers to support its
operations.
每一个组织,无论是制造商,批发
商,零售商或者,购买材料,服务和耗材从
外部供应商来支持其业务
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Historically,
the process of acquiring these needed inputs has
been
considered somewhat of a nuisance,
at least as compared to other activities
within the firm. Purchasing was
regarded as a clerical or low-level managerial
activity charged with responsibility to
execute and process orders initiated
elsewhere in the organization1. The
role of purchasing was to obtain the
desired resource at the lowest possible
purchase price from a supplier. This
traditional view of purchasing has
changed substantially in the past two
decades. The modem focus on supply
chain management with its emphasis
on
relationship between buyers and sellers has
elevates purchasing to a
higher,
strategic-level activity. This strategic role is
differentiated from the
traditional
through the term procurement, although in practice
many people
use the terms purchasing
and procurement interchangeable.
从历史上看,
获得这些需要投入的过程中已经有所扰民认为,至少比在公司内
的其他活动。采购被视为
文书或低层次的管理活动负责的责任和执行过程中的
组织
1
p>
其他地方发起的订单。采购的作用是,以获得所需的资源从一个供应商
可能的最低收购价。这种传统的采购来看,在过去的二十年发生重大变化。调
制解调器
专注于供应链管理,其重点是买家和卖家之间的关系有采购提升到一
个更高的战略层次活
动。这一战略的作用是区别于传统的通过长期采购,但在
实践中,许多人使用的条款的采
购和采购互换
Procurement
Perspectives
采购展望
The evolving focus on procurement as a
key capability in organizations has
stimulated a new perspective regarding
its role in supply chain management.
The emphasis has shifted from
adversarial, transaction-focused negotiation
with suppliers to ensuring that the
firm is positioned to implement its
manufacturing and marketing strategies
with support from its supply base. In
particular, considerable focus is
placed on ensuring supply, inventory
minimization, quality improvement,
supplier development, and lowest total
cost of ownership.
不断发展的重点放在
采购作为企业的关键能力,刺激就其在供应链管理中的作
用一个新的视角。重点已经从与
供应商的对抗性,交易谈判的重点转移到确保
公司被定位为实施其制造和营销策略,从它
的供应基地的支持。尤其是,相当
多的重点放在确保供应,库存最小化,质量改进,供应
商开发和最低的总拥有
成本
Procurement
Strategies
采购策略
Effective procurement strategy to
support supply chain management
concepts requires a much closer working
relationship between buyers and
sellers
than was traditionally practiced. Specially, three
strategies have
emerged: volume
consolidation, supplier operational integration,
and value
management. Each of these
strategies requires an increasing degree of
interaction between supply chain
partners; thus, they may not be considered
as distinct and separate but rather as
evolutionary stages of development.
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