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A wood or fiber cover placed around such containers as cans or bottles.

Jacking it around

The process of backing a semi-trailer around a sharp corner.


To place the trailer at a very sharp angle to the tractor.

Jackpot Line

This is one of those funky terms that has somehow achieved widespread acceptance in the material handling industry. Usually used with automated systems such as automated conveyor systems, a Jackpot Line refers to an area where exceptions are routed. Exceptions may include orders that could not be completed (shortages or WMS error), orders requiring special processing, or weight or size exceptions. The terms Jackpot Lane, or Jackpot Area are also used to describe similar exception areas.

Jacob’s Ladder

A rope ladder suspended from the side of a vessel and used for boarding.

Jake Brake

Jake Brake or Jacobs Brake is a compression braking mechanism installed on some Diesel engines. When activated, it opens exhaust valves in the cylinders, releasing the compressed air trapped in the cylinders, and slowing the vehicle. These devices are also referred to as compression release engine brakes.


An information exchange system on industrial health and safety.


A computer term for a general-purpose programming language created by Sun Microsystems. Java can be used to create Java applets. A Java program is downloaded from the web server and interpreted by a program running on the computer running the Web browser.

Java applet

A computer term for a short program written in Java that is attached to a web page and executed by the computer on which the Web browser is installed.

Java script

A computer term for a cross-platform, World Wide Web scripting language developed by Netscape Communications. JavaScript code is inserted directly into an HTML page.


Joint Depot Maintenance Activities Group (JDMAG)- a U.D. DoD group that provides advice and support to the JG-DM. Maintains a web-site (www.jdmag.wpafb.af.mil/) that shows the Depot Maintenance Source of Repair decisions.

Jelly bean

A generic term for a low cost computer chip that performs simple tasks such as monitoring temperature.


The process of throwing cargo overboard when the ship is in danger is an act of jettison. The division of the responsibility among the shippers and ship owner for an act of jettison which is done for the good of all shipments aboard is provided for in the maritime law and insurance.


A mole or breakwater, running out into the sea to protect harbour or coast. It is sometimes used as a landing-pier.


A telescope-type structure that extends to connect an airline passenger terminal with jet aircraft; serves to protect passengers from weather as well as speed up loading and unloading process.


Joint Group on Depot Maintenance (JG-DM): The U.S. Dod flag level officers and civilians from each service that are responsible for depot maintenance. This group is responsible to review the depot maintenance function to achieve effective and affordable support for the nation’s weapon systems.


Projecting arm of a crane. Attachment connected to the top of a crane boom.


The concept of adding an element of human judgment to automated equipment. In doing this, the equipment becomes capable of discriminating against unacceptable quality, and the automated process becomes more reliable. This concept, also known as autonomation, was pioneered by Sakichi Toyoda at the turn of the twentieth century when he invented automatic looms that stopped instantly when any thread broke. This permitted one operator to oversee many machines with no risk of producing large amounts of defective cloth. The term has since been extended beyond its original meaning to include any means of stopping production to prevent scrap (for example the and on cord which allows assembly-plant workers to stop the line), even where this capability is not built-in to the production machine itself.


Vendor-managed operations taking place within a customer’s facility. JIT II was popularised by the Bose Corporation. The supplier reps, called “inplants”, place orders to their own companies, relieving the customer’s buyers from this task. Many also become involved at a deeper level, such as participating in new product development projects, manufacturing planning (concurrent planning).


That work which is undertaken to meet a customer or production order and, for production control purposes, has a unique identification.


A middleman who buys and sells merchandise for others.


Person who operates a yard tractor.

Joint agency tariff

A tariff that is published on behalf of two or more transportation rate bureaus applying to traffic moving between the respective geographic jurisdictions.

Joint agent

An official who acts as agent for two or more carriers.

Joint boards

In administrative regulatory law, when a case involves two or more jurisdictions, a joint board may be established with representatives of each to hear the case and make the decision.

Joint Computer-Aided Acquisition and Logistic Support

The JCALS program is the Department of Defense’s lead system for implementation of CALS. The functionality of JCALS will provide automation of technical manuals and other maintenance documents.

Joint cost

A cost in one area or function that arise automatically because another took place and cannot be rationally allocated to each one. Example: cost of backhaul in relation to cost of fronthaul. A true costs of each leg of the trip cannot be rationally calculated. It can only be located using arbitrary.means.

Joint cost

A type of common cost where products are produced in fixed proportions, and the cost incurred to produce on product necessarily entails the production of another; the bankhaul is an example.

Joint metrics

Application of common performance measures that are applied by two or more firms. The metrics might be related to customer service or financial measures.

Joint Rate

A rate from a point located in one point located in one transportation line or a point located on another transportation line. A joint rate is made by agreement or arrangement between the carriers and published in a single publication under the concurrence of all transportation lines involved.

Joint Rate

A rate over a route that involves two or more carriers to transport the shipment.

Joint Routes

Routes established by two or more carriers for the continuous through movement of traffic via their respective lines.

Joint Supplier Agreement (JSA)

Indicative of Stage 3 Sourcing Practices, the JSA includes terms and conditions, objectives, process flows, performance targets, flexibility, balancing and incentives.

Joint tariff

A tariff containing joint rates.

Joint through rates

When a transportation movement requires two or more carriers, and the carriers have agreed to a special joint through rate – a single rate is published to cover the interline movement. A distinction should be made between a joint rate and through rate, however. A through rate is the result of an expressed or implied agreement. A through rate may be joint rate or a combination of local or joint rates. It is a well established principle that a joint through rate is the only legal rate between the points where it is unconditionally established. It will take precedence over any combination of intermediate rates between the given points. However, a tariff may provide that the aggregate of the intermediate rate is applicable. Under these circumstances, is a combination of several intermediate rates is lower than a through rate, it is applicable.

Joint traffic

Freight is transported by two or more carriers between origin and destination.

Joint Venture

A joint activity of two or more companies, usually performed under a common name.


Joint Photographic Expert Group: A computer term which is an abbreviation for the Joint Photographic Expert Group. A graphical file format used to display high-resolution color images on the World Wide Web. JPEG images apply a user-specified compression scheme that can significantly reduce the large file size usually associated with photo-realistic color images. A higher level of compression results in lower image quality, whereas a lower level of compression results in higher image quality.

Junction point

The connecting point where lines of two or more railroads meet, including the connection of a main line and a branch line – or where lines of the same company meet.


The extent or power of exercising judicial authority. Arises when a question of which country, state, or legal body has authority over a situation.


Juridical decisions used for explanation and meaning of law.

Just In Time

An inventory control system that controls material flow into assembly and manufacturing plants by coordinating demand and supply to the point where desired materials arrive just in time for use. An inventory reduction strategy that feeds production lines with products delivered “just in time”. Developed by the auto industry, it refers to shipping goods in smaller, more frequent lots.


The act of showing certain acts or deeds to be just or right.


A combination of just-in-time delivery with production line sequencing of delivered items. A customer will notify a supplier of the items needed and the sequence based on the customer’s manufacturing schedule, the supplier will then put together the shipment with the items in the appropriate sequence and deliver them to the customer (sometimes directly to the assembly line). This is most common in the automotive and similar assembly line industries where each unit on the assembly line can be configured differently (component options).

Just-In-Time Inventory

A method of controlling and reducing direct and work-in-process inventory by having suppliers deliver material “just in time” to manufacturing.

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