Production and Operations Analysis, Seventh Edition
Production and Operations Analysis, Seventh Edition
7th Edition
ISBN: 9781478623069
Author: Steven Nahmias, Tava Lennon Olsen
Publisher: Waveland Press, Inc.
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Chapter 8.6, Problem 40P
Summary Introduction

Interpretation:Explain the positive and negative points of ‘small lot sizes’ as applicable to just-in-time.

Concept Introduction:Just-in-time is one of the characteristics of the inventory and scheduling systems implying that every input resource is to be provided and every work is to be carried out in the required quantity just when it (the resource and/or the work) is required; neither earlier nor later than the requirement. This, as is obvious, tends to eliminate all inventory, double handling, storage etc. This is an essential concept in lean manufacturing.

Small lot sizes is a derivative of JIT because when the requirements are to be as per requirement, which shall be quite often to avoid holding any inventory. This translates to small lots where ‘small’ is an indicative word.

Summary Introduction

Interpretation: Explain the contribution of Integrated purchasing and inventory control’ to the success of just-in-time.

Concept Introduction:Just-in-time is one of the characteristics of the inventory and scheduling systems implying that every input resource is to be provided and every work is to be carried out in the required quantity just when it (the resource and/or the work) is required; neither earlier nor later than the requirement. This, as is obvious, tends to eliminate all inventory, double handling, storage etc. This is an essential concept in lean manufacturing.

Inventory control encompasses the management of inventories in all phases including purchasing. Since everything is required as and when and as much as is just required, the entire systems needs to run in a highly coordinated manner. Not only all the phases of the inventory are to be integrated with purchasing but also with finance and production planning. If this is not done, it might create more confusion than benefit.

Summary Introduction

Interpretation: Discuss the statement ‘Kanban information systems’ are very useful for just-in-time with the positive and negative aspects.

Concept Introduction:Just-in-time is one of the characteristics of the inventory and scheduling systems implying that every input resource is to be provided and every work is to be carried out in the required quantity just when it (the resource and/or the work) is required; neither earlier nor later than the requirement. This, as is obvious, tends to eliminate all inventory, double handling, storage etc. This is an essential concept in lean manufacturing.

It may not be absolutely correct to use the term ‘Kanban information systems’. It is more apt to say Kanban scheduling system whereby a formatted card called Kanban is used to supply material from a previous process to the next process. Kanban (meaning card) is filled up by the next process giving its requirements to the previous process.

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Discuss the advantages and disadvantages of each of the following features ofjust-in-time:c. Kanban information system.
Just-in-time has been characterized as a system whose primary goal is to eliminate waste. Discuss how waste can be introduced in (a) relationships with vendors b) receipt of material into the plant, and (c) movement of material through the plant.How do JIT methods cut down on these forms of waste?
Hartley Electronics, Inc., in Nashville, producesshort runs of custom airwave scanners for the defense industry. The owner, Janet Hartley, has asked you to reduce inventory by introducing a kanban system. After several hours ofanalysis, you develop the following data for scanner connectors used in one work cell. How many kanbans do you needfor this connector?
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