Terms and Definitions Set #2 Flashcards
Line Balancing
In a production or process operation line with several processes, machines, or operations in sequence, the discipline of balancing the throughput of each operation in the sequence such that production of any one unit in the sequence is equivalent or “balanced” with each of the other units in the sequence.
Little’s Law
The equation relating Throughput, Inventory, and Flow
Time for a process
THROUGHPUT = INVENTORY divided by FLOW TIME
Logistics
The process of managing materials for operations to meet certain objectives such as delivery speed, low inventories, and high accuracy. A new business opportunity has arisen for firms that specialize in logistics management to supply OEMs with JIT components and systems. Integrated Logistics handle a variety of unrelated components required by a customer or customers.
Maintenance
That classification of employees and process by which machines and equipment are maintained for sustained production.
Make-to-Order
Operations that make products or deliver services only to customer order–no finished goods inventory.
Make-to-Stock
Operations that make products to inventory in anticipation of customer demand–requires demand forecasts.
Manufacturing Engineering
The discipline that plans and implements production processes in an operational setting.
Marginal Analysis
Analysis of the effect of an action or activity at the limits or at a point in the operation rather than on the average. The marginal cost of an additional unit of production may be lower or higher than the average cost.
Master Production Schedule (MPS)
The schedule of finished goods that are to be manufactured based on actual or forecasted customer demand. Work centers are scheduled to manufacture the products to meet the MPS.
Material Control
That process whereby materials are ordered, received, and distributed throughout an operation to satisfy the master production schedule.
Material Flow
That process that defines the flow of materials in an operation.
Material Release
Release means the process and data by which a supplier is notified that material is to be shipped. Releases imply that the supplier already has a purchase contract for the goods to be supplied. The supplier may choose either to manufacture the product in anticipation of the release (forecasting) or wait until receiving the release and manufacture the product between the time that the release is received and the time that the supplier must ship the product to reach the customer plant on time. Release information usually specifies the part number and quantity required and the time it is to be received at the customer plant dock.
Materials
Those components that are part of the production bill of material that are process by an operation.
Mix
The breakdown of the total demand or production that identifies the different products in an aggregate demand or production run.
MRO
Those components and parts not associated with the direct material for a product. Tools, gloves, lubricants, machine maintenance parts are part of MRO.
MRP
Material requirements planning- MRP systems are used in almost all plants. They coordinate the bill of materials, forecasted demand, long lead-time parts, and the inventory in the plant. The reasons MRP systems are generally required relate to the fact that all parts cannot be supplied JIT and that schedules are not predictable. There are still suppliers that give price discounts for larger orders. Further, material receipt, inventory tracking, and engineering changes introduce complexity in plants unless the bills of material are few and simple. A plant that uses JIT exclusively is very rare. Forecasted demand is common for many supplied parts. Further, parts get lost, stolen, and damaged. Parts that do not meet quality standards must be reworked or resupplied. For all these reasons and more, an MRP system is required. MRP systems are quite complex and computer-based. The software incorporating MRP systems can be expensive and difficult to install because it requires and evaluation and possible change of all business practices.
MRP II
Material Resource Planning- an advanced version of MRP that integrates the whole value chain in planning material orders, production, scheduling, and shipments.
Molds
Molds are the same as tools but for plastic or chemical processing part production. A mold is the term used for the tools that shape plastic or other “soft” material parts in injection molding machines, that shape foam pads for furniture and automotive seating, and that shape baked goods. Thus, a baking pan is a mold for bread.
Muda
Waste. Reducing waste throughout the enterprise is one of the fundamentals tenets of the Toyota Production System.
Multiple Sourcing
Sourcing more than one supplier for the same part or system.
Net Income
The income remaining after all expenses have been deducted from revenues including taxes and extraordinary.
Newsvendor
Name of traditional problem and solution in operations management dealing with single order quantity optimization such as newspaper and other spoilable goods.
NLRB
National Labor Relations Board is an independent administrative agency responsible directly to the President who administers most of the provisions of the National Labor Relations Act. It is the federal agency responsible for administering union matters and issues.
Normal Distribution
Denotes the Gaussian probability function defined by the exponent of the weighted squared probability variable
NPD
New product development
OSHA
Occupational Safety and Health Administration. The federal agency that administers The Occupational Safety and Health Act was formed by an Act of Congress in 1970. Ever since, OSHA?s mission has been clear and unwavering: “to assure so far as possible every working man and women in the nation safe and healthy working conditions.” Coverage of the Act extends to all employers and their employees in the 50 states, the District of Columbia, Puerto Rico, and all other territories under Federal Government jurisdiction.
OEM
Original Equipment Manufacturer. The term OEM denotes a company or sector that manufacturers equipment ready for purchase by the end-use customer. The large automotive companies are referred to as OEMs. Suppliers to such companies supply to the OEMs, they are not OEMs themselves. There is an implication of a distribution entity between an OEM and the ultimate customer.
Operating Income
Gross profit less administrative (SG&A) and development (ER&G) expenses.
Operations
Any activity that transforms and adds value to an input stream. The input stream can be a physical entities, services, or flows. The valued added transformation produces products or services that are designed to meet a customer demand. Operations range from processing loan applications to production of computers, to designing buildings.
Overhead
In general denotes an allocated cost to a direct operation. It includes all manufacturing costs, other than direct material and direct labor. In addition to indirect material and indirect labor, overhead cost includes utilities, maintenance, depreciation and taxes.
Overtime
Work beyond the federally mandated work period usually a day or a week. Overtime pay regulations are quite specific.
Parts File Folder
There are many names for a parts file folder. The concept is simple, however. A parts file folder contains all the required information about a part including cost, lead times for production, approved suppliers, tooling requirements and cost, drawings of the part, its tooling, and fixturing, computer data if it has been programmed for production on a computer-controlled machine, quality specifications, key characteristics, etc.
Pacing Process
That process in a product production line that is used to signal all the other processes in the line for the production Takt time. It is generally the final process but does not have to be. The production rate of each process is then tied to the production rate of the pacing process.
Payroll
The employees on a payroll for a company; also the process by which employees are paid including deductions and additions for taxes, savings, benefits, payroll deductions, overtime, etc. Payroll systems can be quite complex and must be updated continually as tax and benefit policies and procedures change.
Pick and Place
Equipment that picks up parts from one station on an assembly line and places them on the next. It is usually a pick and place robot.
P-K Formula
An approximate formula for buffer inventory as a function of activity utilization, number of activity servers, and statistical coefficients of variation for the demand and the process. Given utilization ?, c servers, and input and demand coefficients of variation, the buffer inventory is: ???++=1)1(22)22(IcCCpi
Plant Rate
Plant rate is the total value added by a plant divided by the total direct labor hours in a yearly budget. It is the shop rate plus all other plant costs divided by the direct labor hours in a yearly budget.
Poka Yoka
Error proofing seems to be a simple concept, but there are many variations on the primary theme. The basic concept is that a product is prohibited from being taken out of its fixture if it has a quality defect as a result of the machine or operator action. The defect must be corrected prior to release of the product from the fixture.
Pooling
That action that combines in parallel previously independent processes to reduce the total variance compared to the variances that would occur when the processes were independent. Generally reduces the variance of the combined processes by the square root of the sum of the squares of the independent processes.
Postponement
That action that delays complexity to later stages in an operation so that product differentiation occurs later in the production cycle. Examples: 1. are different model cars using the same drive trains, suspensions, and mechanical components; differentiation coming with plastic and sheet metal ornamentation, 2. Chinese food that takes a few basic ingredients and develops a complex menu that can be prepared quickly.
PP&E
The property, plant and equipment or fixed assets of a company.
Product Liability
That legal liability for product malfunction in the hands of a consumer or customer. It is also the process by which liability is established.
Product Mix
The proportion of different products in the total production of an operation or plant.
Productivity
Measure of labor efficiency. Amount of goods produced per unit of labor cost or hours. It can be applied more generally to the efficiency of machines and systems.