1
Production Planning and Inventory
Control
2
 Introduction to methods for managing production,
inventory, and distribution systems
 Topics covered include demand forecasting,
capacity planning, production planning and
scheduling, production and inventory control, and
supply chain coordination
 Use of quantitative models and analytical tools for
supporting decisions in each of the above areas
Course Objectives
3
Special emphasis will be given to the link between
operational issues and strategic objectives
Implications of various emerging technologies,
business practices, and government regulations
Course Objectives (Continued…)
4
 An introductory course in probability and statistics
 An introductory course in linear programming
 Knowledge of Microsoft Excel & Microsoft Solver
Prerequisites
5
 Factory Physics by Wallace Hopp and Mark
Spearman
 The Goal by Eliyahu Goldratt
 Lean Thinking by James Womack and Daniel
Jones
Texts
6
 Week 1 Introduction to Production Planning and
Inventory Control
 Week 2 Inventory Control – Deterministic
Demand
 Week 3 Inventory Control – Stochastic Demand
 Week 4 Inventory Control – Stochastic Demand
 Week 5 Inventory Control – Stochastic Demand
 Week 6 Inventory Control – Time Varying
Demand
Lecture Topics
7
 Week 7 Inventory Control – Multiple Echelons
 Week 8 Demand Forecasting
 Week 9 Demand Forecasting
 Week 10 Production Planning and Scheduling
 Week 11 Production Planning and Scheduling
 Week 12 Managing Manufacturing Operations
 Week 13 Managing Manufacturing Operations
 Week 14 Managing Manufacturing Operations
 Week 15 Project Presentations
Lecture Topics (Continued…)
8
 Teams of 2 or 3
 Type of project
 Problem solving
 Case study
 Reviews
 Outcome
 A proposal
 Oral presentation
 Written report
Group Projects
9
 A mathematical model
 A computer model
 Data collection and statistical analysis
Problem Solving
10
Focus on one company and document:
 managerial practice
 use of a technology
 decision making processes
Case Studies
11
 An industry
 An emerging technology
 A managerial practice
 Academic research
Reviews
12
 Electronics
 Automotive
 Food
 Clothing
 Medical devices
 Energy
Example Industries
13
 RFID
 Wireless communication and mobile computing
 Online procurement portals
 Social media
Example Technologies
14
 Outsourcing
 Vendor managed inventory (VMI)
 Delayed product differentiation
 Collaborative forecasting, planning, & replenishment
(CFPR)
 Third & fourth party logistics (3/4PL)
 Green/sustainable supply chains
Example Practices
15
 Energy efficient and sustainable supply chains
 Energy consumption
 Carbon footprint
 Closed loop supply chains
 Alternative sourcing, materials, processing
This Year’s Theme
16
Production/Manufacturing
Production/manufacturing is the process of converting
raw materials or semi-finished products into finished
products that have value in the market place. This
process involves the contribution of labor, equipment,
energy, and information.
17
The Production System
Production
System
Raw materials
Energy
Labor
Equipment
Information
Finished products
Scrap
Waste
18
Inventory
Inventory is both an input and output of the production
process. Inventory can be in the form of raw materials,
semi-finished, and finished products.
19
The Inventory System
Supply source Demand source
Inventory
20
The Production-Inventory System
Raw materials
Suppliers
Fabrication
Component parts
inventory
Assembly
Finished goods
inventory
Distribution
and sales
21
The Supply Chain
2nd tier suppliers
1st tier
suppliers
Assembly/
Manufacturing
Distribution
centers
Retailers
22
Supply Chain Management
Supply Chain Management (SCM) is the set of
functions concerned with the effective utilization of
limited resources that may reside with one or more
independent firms and the management of material,
information, and financial flows within and between
these firms, so as to satisfy customer demands and create
profits for all firms.
23
Production Planning and
Inventory Control
Production planning and inventory control is the subset
of SCM functions that focus on managing production
operations and inventory throughout the supply chain.
24
Examples of Decisions
25
Examples of Decisions
 What should we produce, how much, and when
(forecasting)?
 How much can we produce (capacity planning)?
 How much do we have and how much do we
need (inventory management)?
 When should we produce (production planning
and scheduling)?
26
A Hierarchy of Decisions
Long term
forecasting
Capacity
Planning
Network design
& facility location
Production
Planning
Production
Scheduling
Inventory
Management
Warehousing &
order fulfillment
Transportation
& Distribution
Sales &
Marketing
27
Example Performance Measures
28
 Cost (are products being created at minimum or
acceptable cost?)
 Quality (what are the specifications of the
products? What percentages of shipped products
meet specification?)
 Variety (how many types of products are - or
can be – simultaneously produced?)
 Service (how long does it take to fulfill a
customer order? how often are quoted lead times
met?)
Examples of Performance Measures
29
 Flexibility (how quickly can existing resources
be reconfigured to produce new products?)
 Worker satisfaction (are workers and managers
throughout the supply chain happy and
motivated?)
 Safety (are work environments safe for workers
and the surrounding community?)
 Environmental impact (how environmentally
friendly are the supply chain processes and the
products?)
Examples of Performance Measures
(continued…)
30
The Bottom Line
In the long run, the supply chain must be
profitable by delivering value to the end customer
and to do so over the long run.
31
Classification of the Production
Process
 Production quantity
32
Classification of the Production
Process
 Production quantity
– Mass production
– Batch production
– Job shop production
33
Classification of the Production
Process
 Production quantity
– Mass production
– Batch production
– Job shop production
 Product variety
34
Classification of the Production
Process
 Production quantity
– Mass production
– Batch production
– Job shop production
 Product variety
– Single product or product line
– Family of similar products
– One-of-a-kind products
35
Mass Production Systems
36
Mass Production Systems
 Low product variety
 High production volumes
 Specialized labor
 Dedicated equipment
 High reconfiguration costs
 Make-to-stock production
37
Batch Production Systems
38
Batch Production Systems
 Medium product variety
 Products are made in larger lots
 products are made to stock
 Programmable/reconfigurable equipment
 Significant setup costs
39
Job Shops
40
Job Shops
 High product variety
 Products are made in small lots
 Products are made to order
 Flexible equipment and labor
 Small setups
41
Classification of Production Systems
(continued…)
 Order fulfillment
42
Classification of Production Systems
(continued…)
 Order fulfillment
– Make-to-stock systems (MTS)
– Make-to-order systems (MTO)
– Hybrid MTO/MTS
43
Classification of Production Systems
(continued…)
 Order fulfillment
– Make-to-stock systems (MTS)
– Make-to-order systems (MTO)
– Hybrid MTO/MTS
 Resource configuration
44
Classification of Production Systems
(continued…)
 Order fulfillment
– Make-to-stock systems (MTS)
– Make-to-order systems (MTO)
– Hybrid MTO/MTS
 Resource configuration
– Product layout
– Process layout
– Cellular layout
– Fixed position layout
45
Classification of Production
Systems (continued…)
 Inputs/outputs
46
Classification of Production
Systems (continued…)
 Inputs/outputs
– Discrete production systems (discrete inputs and
outputs - cars, computers, machine tools, etc)
– Continuous production systems (continuous inputs
and outputs - chemicals, textiles, food processing,
pharmaceuticals)
– Hybrid systems (Discrete inputs/continuous outputs
or continuous inputs/discrete outputs - steel, plastics,
recycling)
47
Process capabilities
& business strategy
 Example product attributes: price, quality,
variety, service, demand uncertainty
 Example process attributes: cost, quality,
flexibility, lead time
48
 A firm must choose a business strategy - attribute
values for its portfolio of products - that
differentiates it from the competition.
 A firm must choose process capabilities, attribute
values for its process, that support its business
strategy.
49
 A business strategy can be driven by market
opportunities or by a competitive advantage in
process capabilities.
 In both cases, there must be a fit between process
capability and business strategy.
50
Matching Process Choice with
Product Strategy Choice
Product variety
Low High
Area of
strategic fit
Low
High
Process
flexibility
51
Matching Process Choice with Product
Strategy Choice (Continued…)
Demand uncertainty
Low High
Area of
strategic fit
High
Low
Lead
time
52
The Evolution of Process
Capabilities
 Volume (1920/30/40’s)
 Cost (1950/60’s)
 Quality (1970/80’s)
 Time (1980/1990’s)
 Flexibility (1990/2000’s)
 Mass customization (2000’s & beyond)
53
Other Emerging Trends
Resiliency
Sustainability (and stewardship)
54
 Read Chapters 0, 1 & 2 of text book (Factory Physics)
 Read paper 1 from the reading list
Assignment

PPIC description for anyone who want to know

  • 1.
    1 Production Planning andInventory Control
  • 2.
    2  Introduction tomethods for managing production, inventory, and distribution systems  Topics covered include demand forecasting, capacity planning, production planning and scheduling, production and inventory control, and supply chain coordination  Use of quantitative models and analytical tools for supporting decisions in each of the above areas Course Objectives
  • 3.
    3 Special emphasis willbe given to the link between operational issues and strategic objectives Implications of various emerging technologies, business practices, and government regulations Course Objectives (Continued…)
  • 4.
    4  An introductorycourse in probability and statistics  An introductory course in linear programming  Knowledge of Microsoft Excel & Microsoft Solver Prerequisites
  • 5.
    5  Factory Physicsby Wallace Hopp and Mark Spearman  The Goal by Eliyahu Goldratt  Lean Thinking by James Womack and Daniel Jones Texts
  • 6.
    6  Week 1Introduction to Production Planning and Inventory Control  Week 2 Inventory Control – Deterministic Demand  Week 3 Inventory Control – Stochastic Demand  Week 4 Inventory Control – Stochastic Demand  Week 5 Inventory Control – Stochastic Demand  Week 6 Inventory Control – Time Varying Demand Lecture Topics
  • 7.
    7  Week 7Inventory Control – Multiple Echelons  Week 8 Demand Forecasting  Week 9 Demand Forecasting  Week 10 Production Planning and Scheduling  Week 11 Production Planning and Scheduling  Week 12 Managing Manufacturing Operations  Week 13 Managing Manufacturing Operations  Week 14 Managing Manufacturing Operations  Week 15 Project Presentations Lecture Topics (Continued…)
  • 8.
    8  Teams of2 or 3  Type of project  Problem solving  Case study  Reviews  Outcome  A proposal  Oral presentation  Written report Group Projects
  • 9.
    9  A mathematicalmodel  A computer model  Data collection and statistical analysis Problem Solving
  • 10.
    10 Focus on onecompany and document:  managerial practice  use of a technology  decision making processes Case Studies
  • 11.
    11  An industry An emerging technology  A managerial practice  Academic research Reviews
  • 12.
    12  Electronics  Automotive Food  Clothing  Medical devices  Energy Example Industries
  • 13.
    13  RFID  Wirelesscommunication and mobile computing  Online procurement portals  Social media Example Technologies
  • 14.
    14  Outsourcing  Vendormanaged inventory (VMI)  Delayed product differentiation  Collaborative forecasting, planning, & replenishment (CFPR)  Third & fourth party logistics (3/4PL)  Green/sustainable supply chains Example Practices
  • 15.
    15  Energy efficientand sustainable supply chains  Energy consumption  Carbon footprint  Closed loop supply chains  Alternative sourcing, materials, processing This Year’s Theme
  • 16.
    16 Production/Manufacturing Production/manufacturing is theprocess of converting raw materials or semi-finished products into finished products that have value in the market place. This process involves the contribution of labor, equipment, energy, and information.
  • 17.
    17 The Production System Production System Rawmaterials Energy Labor Equipment Information Finished products Scrap Waste
  • 18.
    18 Inventory Inventory is bothan input and output of the production process. Inventory can be in the form of raw materials, semi-finished, and finished products.
  • 19.
    19 The Inventory System Supplysource Demand source Inventory
  • 20.
    20 The Production-Inventory System Rawmaterials Suppliers Fabrication Component parts inventory Assembly Finished goods inventory Distribution and sales
  • 21.
    21 The Supply Chain 2ndtier suppliers 1st tier suppliers Assembly/ Manufacturing Distribution centers Retailers
  • 22.
    22 Supply Chain Management SupplyChain Management (SCM) is the set of functions concerned with the effective utilization of limited resources that may reside with one or more independent firms and the management of material, information, and financial flows within and between these firms, so as to satisfy customer demands and create profits for all firms.
  • 23.
    23 Production Planning and InventoryControl Production planning and inventory control is the subset of SCM functions that focus on managing production operations and inventory throughout the supply chain.
  • 24.
  • 25.
    25 Examples of Decisions What should we produce, how much, and when (forecasting)?  How much can we produce (capacity planning)?  How much do we have and how much do we need (inventory management)?  When should we produce (production planning and scheduling)?
  • 26.
    26 A Hierarchy ofDecisions Long term forecasting Capacity Planning Network design & facility location Production Planning Production Scheduling Inventory Management Warehousing & order fulfillment Transportation & Distribution Sales & Marketing
  • 27.
  • 28.
    28  Cost (areproducts being created at minimum or acceptable cost?)  Quality (what are the specifications of the products? What percentages of shipped products meet specification?)  Variety (how many types of products are - or can be – simultaneously produced?)  Service (how long does it take to fulfill a customer order? how often are quoted lead times met?) Examples of Performance Measures
  • 29.
    29  Flexibility (howquickly can existing resources be reconfigured to produce new products?)  Worker satisfaction (are workers and managers throughout the supply chain happy and motivated?)  Safety (are work environments safe for workers and the surrounding community?)  Environmental impact (how environmentally friendly are the supply chain processes and the products?) Examples of Performance Measures (continued…)
  • 30.
    30 The Bottom Line Inthe long run, the supply chain must be profitable by delivering value to the end customer and to do so over the long run.
  • 31.
    31 Classification of theProduction Process  Production quantity
  • 32.
    32 Classification of theProduction Process  Production quantity – Mass production – Batch production – Job shop production
  • 33.
    33 Classification of theProduction Process  Production quantity – Mass production – Batch production – Job shop production  Product variety
  • 34.
    34 Classification of theProduction Process  Production quantity – Mass production – Batch production – Job shop production  Product variety – Single product or product line – Family of similar products – One-of-a-kind products
  • 35.
  • 36.
    36 Mass Production Systems Low product variety  High production volumes  Specialized labor  Dedicated equipment  High reconfiguration costs  Make-to-stock production
  • 37.
  • 38.
    38 Batch Production Systems Medium product variety  Products are made in larger lots  products are made to stock  Programmable/reconfigurable equipment  Significant setup costs
  • 39.
  • 40.
    40 Job Shops  Highproduct variety  Products are made in small lots  Products are made to order  Flexible equipment and labor  Small setups
  • 41.
    41 Classification of ProductionSystems (continued…)  Order fulfillment
  • 42.
    42 Classification of ProductionSystems (continued…)  Order fulfillment – Make-to-stock systems (MTS) – Make-to-order systems (MTO) – Hybrid MTO/MTS
  • 43.
    43 Classification of ProductionSystems (continued…)  Order fulfillment – Make-to-stock systems (MTS) – Make-to-order systems (MTO) – Hybrid MTO/MTS  Resource configuration
  • 44.
    44 Classification of ProductionSystems (continued…)  Order fulfillment – Make-to-stock systems (MTS) – Make-to-order systems (MTO) – Hybrid MTO/MTS  Resource configuration – Product layout – Process layout – Cellular layout – Fixed position layout
  • 45.
    45 Classification of Production Systems(continued…)  Inputs/outputs
  • 46.
    46 Classification of Production Systems(continued…)  Inputs/outputs – Discrete production systems (discrete inputs and outputs - cars, computers, machine tools, etc) – Continuous production systems (continuous inputs and outputs - chemicals, textiles, food processing, pharmaceuticals) – Hybrid systems (Discrete inputs/continuous outputs or continuous inputs/discrete outputs - steel, plastics, recycling)
  • 47.
    47 Process capabilities & businessstrategy  Example product attributes: price, quality, variety, service, demand uncertainty  Example process attributes: cost, quality, flexibility, lead time
  • 48.
    48  A firmmust choose a business strategy - attribute values for its portfolio of products - that differentiates it from the competition.  A firm must choose process capabilities, attribute values for its process, that support its business strategy.
  • 49.
    49  A businessstrategy can be driven by market opportunities or by a competitive advantage in process capabilities.  In both cases, there must be a fit between process capability and business strategy.
  • 50.
    50 Matching Process Choicewith Product Strategy Choice Product variety Low High Area of strategic fit Low High Process flexibility
  • 51.
    51 Matching Process Choicewith Product Strategy Choice (Continued…) Demand uncertainty Low High Area of strategic fit High Low Lead time
  • 52.
    52 The Evolution ofProcess Capabilities  Volume (1920/30/40’s)  Cost (1950/60’s)  Quality (1970/80’s)  Time (1980/1990’s)  Flexibility (1990/2000’s)  Mass customization (2000’s & beyond)
  • 53.
  • 54.
    54  Read Chapters0, 1 & 2 of text book (Factory Physics)  Read paper 1 from the reading list Assignment