Imperfect Inventory Systems: Inventory and Production Management

✍ Scribed by Ata Allah Taleizadeh

• Publisher: Springer
• Year: 2021
• Tongue: English
• Leaves: 598
• Category: Library

✦ Synopsis

This book examines inventory and production strategies that can reduce unexpected breakdown costs. It highlights different EPQ models to deal with such problems, providing optimal value derivations for decision variables. It provides proofs for concavity or convexity of objective functions. The chapters also include numerical examples for all the developed mathematical models. Imperfect Inventory Systems: Inventory and Production Management and Breakdown should be useful for professionals working on supply chains, but also researchers in operations research and inventory management.

✦ Table of Contents

Contents
Chapter 1: Introduction
1.1 Imperfect Items
1.2 Scrap
1.3 Rework
1.4 Multi-product Single Machine
1.5 Quality Considerations
1.6 Maintenance
References
Chapter 2: Imperfect EOQ System
2.1 Introduction
2.2 Literature Review
2.2.1 Deterioration, Perishability, and Lifetime Constraints
2.2.2 Imperfect-Quality Items
2.3 EOQ Model with No Shortage
2.3.1 Imperfect Quality
2.3.2 Maintenance Actions
2.3.3 Screening Process
2.3.4 Learning Effects
2.3.4.1 Different Holding Costs
2.3.4.2 Transfer of Learning
2.3.5 EOQ Models with Imperfect-Quality Items and Sampling
2.3.5.1 Inspection Shifts from Buyer to Supplier
2.3.5.2 Sampling Inspection Plans
2.3.5.3 Instantaneous Replenishment Model with Sampling
2.3.6 Buy and Repair Options
2.3.6.1 Model I: Repair Case of Jaber et al. (2014)
2.3.6.2 Model II: Buy Case of Jaber et al. (2014)
2.3.7 Entropy EOQ
2.3.7.1 Model 1: Entropy EOQ Without Screening
Considering Entropy Cost
2.3.7.2 Model 2: Entropy EOQ with Screening
2.4 EOQ Model with Backordering
2.4.1 Imperfect Quality and Inspection
2.4.2 Multiple Quality Characteristic Screening
2.4.3 Rejection of Defective Supply Batches
2.4.4 Rework and Backordered Demand
2.4.5 Learning in Inspection
2.4.6 EOQ Model for Imperfect-Quality Items
2.5 EOQ Model with Partial Backordering
2.5.1 EOQ Model of Imperfect-Quality Items
2.5.2 Screening
2.5.3 Reparation of Imperfect Products
2.5.4 Replacement of Imperfect Products
References
Chapter 3: Scrap
3.1 Introduction
3.2 No Shortage
3.2.1 Continuous Delivery
3.2.1.1 Considering Steady Production Rate
3.2.1.2 Multi-product Multi-machine
3.2.2 Discrete Delivery
3.2.2.1 Multi-delivery
3.2.2.2 Random Machine Breakdown
The First Case-t t1
Vendor´s Cost
Buyer´s Cost
The Second Case-t < t1
Vendor´s Cost
Buyer´s Cost
Integrating the EPQ Models with and Without Breakdowns
3.3 Fully Backordered
3.3.1 Continuous Delivery
3.3.1.1 Proposing an Arithmetic-Geometric Mean Inequality Method
3.3.1.2 Random Defective Rate
3.3.1.3 Random Breakdown
3.3.1.4 Integrated Procurement-Production-Inventory Model
3.3.1.5 Service Level Constraint
3.4 Partial Backordered
3.4.1 Continuous Delivery
3.4.1.1 Multi-product Single-Machine System
3.5 Conclusion
References
Chapter 4: Rework
4.1 Introduction
4.2 Literature Review
4.3 No Shortage
4.3.1 Imperfect Item Sales
4.3.2 Rework Policy
4.3.3 Imperfect Rework
4.3.4 Quality Screening
4.3.4.1 Salvaging of Defective Items
4.3.4.2 Reworking of Defective Items
4.4 Backordering
4.4.1 Simple Rework
4.4.2 Defective Product
4.4.2.1 Model I: EPQ Model for Production Time Greater Than or Equal to the Time to Eliminate Backorders
4.4.2.2 Model II: EPQ Model for Production Time Less than the Time to Eliminate Backorders
4.4.3 Random Defective Rate: Same Production and Rework Rates
4.4.4 Rework Process and Scraps
4.4.4.1 Without Rework
4.4.4.2 Rework Case and Quality Improvement
4.4.5 Rework and Preventive Maintenance
4.4.6 Random Defective Rate: Different Production and Rework Rates
4.4.7 Imperfect Rework Process
4.5 Partial Backordering
4.5.1 Immediate Rework
4.5.2 Repair Failure
4.6 Multi-delivery
4.6.1 Multi-delivery Policy and Quality Assurance
4.6.2 Multi-delivery and Partial Rework
4.6.3 Multi-delivery Single Machine
4.6.4 Multi-product Two Machines
4.6.5 Shipment Decisions for a Multi-product
4.6.6 Pricing with Rework and Multiple Shipments
4.6.6.1 Solution Procedure
References
Chapter 5: Multi-product Single Machine
5.1 Introduction
5.2 Literature Review
5.3 No Shortage
5.3.1 Simple Model
5.3.2 Discrete Delivery
5.3.3 Rework
5.3.4 Auction
5.3.5 Scrapped
5.4 Backordering
5.4.1 Defective Items
5.4.2 Multidefective Types
5.4.3 Interruption in Manufacturing Process
5.4.4 Immediate Rework Process
5.4.5 Repair Failure
5.5 Partial Backordering
5.5.1 Rework
5.5.2 Repair Failure
5.5.3 Scrapped
5.5.4 Immediate Rework
5.5.5 Preventive Maintenance
5.6 Conclusion
References
Chapter 6: Quality Considerations
6.1 Introduction
6.2 Literature Review
6.3 EOQ Model with No Return
6.3.1 No Return Without Shortage
6.3.2 Two Quality Levels with Backordering
6.3.3 Learning in Inspection with Backordering
6.3.4 Partial Backordering
6.3.4.1 Yield Improvement Models
6.4 EOQ Model with Return
6.4.1 Inspection and Sampling
6.4.1.1 Case I: Defective Items Are Immediately Sent Back to the Supplier with an Additional Transportation Cost
6.4.1.2 Case II: The Supplier Will Take Back the Defective Lots in the Next Shipment
6.4.2 Inspection Error
6.4.3 Different Defective Quality Levels and Partial Backordering
6.4.3.1 Case I: θ > α2
6.4.3.2 Case II: α1 θ α2
6.4.3.3 Case III: θ α1
6.5 EPQ Model Without Return
6.5.1 Quality Assurance Without Shortage
6.5.2 Quality Screening and Rework Without Shortage
6.6 EPQ Model with Return
6.6.1 Continuous Quality Characteristic Without Shortage
6.6.2 Inspections Errors Without Shortage
6.7 Conclusion
References
Chapter 7: Maintenance
7.1 Introduction
7.2 No Shortage
7.2.1 Preventive Maintenance
7.2.1.1 Integrated Model and Solution Method
7.2.2 Imperfect Preventive Maintenance
7.2.3 Imperfect Maintenance and Imperfect Process
7.2.4 Aggregate Production and Maintenance Planning
7.3 Backordering
7.3.1 Preventive Maintenance
7.4 Partial Backordering
7.4.1 Preventive Maintenance
7.5 Conclusion
References
Index