Terms and Definitions Set 2 Flashcards
Schedule
Ordering of production to meet forecasted or actual customer demand.
Vending Machine Material Control
Soft drink and snack suppliers to a plant replenish the previous day’s employee purchases each day. They do not forecast demand in any formal way; they stock their delivery trucks with products that have been selling plus maybe some new, more enticing snacks. Plants can use this philosophy to have many types of production material stocked. Suppliers come to the plant daily and replenish bins from which material has been used the previous day. They do not forecast nor know except from recent historical data what the usage will be. Such parts are usually standard ones such as fasteners.
Manufacturing Engineering
The discipline that plans and implements production processes in an operational setting.
Repetitive Manufacturing
Repetitive manufacturing refers to those operations where each product is produced more or less continuously at significant volumes usually on an assembly line. It is assumed that the products are completely engineering so that minimal design or craftwork is done on the manufacturing line. See also job shops. Several industries have characteristics of both repetitive manufacturing and job shops in their operations. Even in job shops, standardized materials, machines, and tooling and fixtures are desirable. Standard sizes, capacities, and performance are characteristic of the construction industry. Also, either industry may incur high tooling costs. Even in the construction industry, repetitive manufacturing is gaining as modular assemblies are replacing craftwork in many of the subassemblies.
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.
Material Flow
That process that defines the flow of materials in an operation.
Single Piece Production
That capability to produce a single unit of a product at the same throughput and cost as volume production. This generally requires that setup times be very small, that there is a production line, and that inventory is stored line side. It is an element of the Toyota Production System and related to JIT.
Welding
The process by which two metals or materials or joined by heat or pressure most often resulting in melting of the materials
Quality Cost
The sum of the preventive, measuring, internal failure, and external failure costs for a plant, division, or company. Implied in quality cost is that the least expensive way to lower quality costs is to invest in prevention rather than pay for external failures. These costs are not part of the general accounting systems and can be quite difficult to accrue.
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.
Purchasing
That function that defines the conditions that govern purchases within a company as well as the actual purchase of the goods and services.
Workforce
The employees of a plant or company
Reengineering
The process of redesigning processes or activities to reduce flow times, inventories, and increase throughput. Its primary objective is to reduce costs and increase customer response. It is generally applied to service or support activities in contrast to physical operations. Redesigning or reconfiguring physical processes is usually referred to as lean transformation. The two terms generally refer to the same process
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.
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.
Turns
Commonly thought of as inventory turns or turnover ratio, turns are defined as the ratio of throughput to average inventory. A high number of turns imply that less inventory is kept on hand and/or materials are received in smaller lots and processed quickly.
Salaried Staff
That staff in a plant or operation that supports the value-added activities in the operation and are paid salaries rather than an hourly rate.
Value Added
Denotes the “value” added to the materials received by a plant in the plants operations. Usually a percentage of COS. Value added can be a combination of true value and the non-value added work done in manufacturing a product. Best practice requires a plant to continually assess which of its activities is true value added and eliminate or reduce the non-value added activities. This assessment can be complex, however. There is a gray area in determining what are the direct materials. There is no confusion on direct materials that are part of the bill of materials. The uncertainty is in the indirect materials some of which could be included in the bill of material. For example, adhesives and lubricants are generally bought in bulk and used as needed with the amounts not accurately specified in the bills. For most plants, these items are small compared with other costs.
Service Level
Probability that customer demand will not exceed inventory for an order cycle.
Warranty
A guarantee of the quality of a product or service that lasts for some period of time and has some specific product or service coverage.
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.
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.
Utilities
Services provided by utility companies–electricity, water, heating fuel, materials disposal, and communications.
Operating Income
Gross profit less administrative (SG&A) and development (ER&G) expenses.
Union Free
A designation that notes that an operation does not have a union.
Union Contract
A formal contract between a union representing employees in a plant or firm and the company for whom the employees work. The contract covers all aspects of pay, working conditions, and strike options. Contracts usually run from 2-6 years.
Sourcing
The process by which supply contracts are let by purchasing.
T&E
Travel and entertainment costs
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.
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.
Supply Chain
The supply chain denotes the process by which components are moved and produced from raw material to the ultimate consumer. It also includes the details of that process such as cost, time, transportation, packaging, etc. It may involve two or three levels of suppliers, one or more OEM plants, a distribution system, spare parts replacement parts flow, and the disposal and recycling process.
Supermarket
That process where material for the next process in an operation is arranged as in a supermarket where visual control of the production is assured. The following process takes from the “supermarket” area what it requires for production in that stage and the preceding process produces exactly what has been taken. Also know as a visual Kanban.
Make-to-Order
Operations that make products or deliver services only to customer order–no finished goods inventory.
Standard Cost
A measure of how much one unit of product or services should cost to produce or deliver. Standard cost may be established using careful analysis of the product or service and the materials and processes used to create it. If established in this manner, standard costs may be thought of as ideal costs, and actual costs may differ from these costs because of actual price differences, errors or mistakes, or changed conditions from the ideal.
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:
Variability
The variations in any portion of an operation?demand, processes, activities, supplier performance, quality, etc.–See coefficients of variation.
Variable Manufacturing Cost
Those operational costs that vary with the production volume in contrast to fixed costs that are independent of production volume.
Push System for Material Control
The push system denotes a system whereby material is released for production and movement by a central or local scheduling algorithm and based on forecasted or anticipated needs for that material. See also pull system. Traditionally, the Push system had been used in plants for production scheduling. The push system is simply when the demand for a product is forecasted and a production schedule is made up according to the forecast of demand through a centralized system. However, the main problem with this system is the variations between the forecasted and the actual demand that may cause excess inventory of finished goods or a backorder in production. In order to avoid problems that are caused due to forecasting errors, companies that use a push system may either: i. Keep finished goods on inventory (safety stock) ii. Have an excess lead-time on delivery to give enough time to produce enough The main disadvantage of the system comes in when the plants have to keep excess inventory or have long lead times for the customers. Inventory costs money and long lead times cause dissatisfied customers. At the same time, companies have spent millions of dollars in the past just to get good MRP software that would be able to help planners plan the production effectively.
Scrap
Components or goods to be discarded usually because of poor quality or no demand.
NPD
New product development
ROE
Return on equity- net income divided by average equity over a period.
Pull System for Material Control
Equivalent to JIT but most often internal to operations. The pull system means that the “release” for moving material within the plant or from suppliers is signaled by the next process in line that needs the material. The material is moved by the demand from the succeeding process in the production chain or routings not by a central schedule or general release. See also Kanban and push system. The idea is to produce what the customer requires. The main challenge in implementing this system comes in when looking at the supply side of raw materials as well as the efficiency of the plants. A company that produces JIT, need to have suppliers that can supply raw materials in a short notice and are therefore located close by in order to receive raw materials in a timely fashion for production. At the same time, manufacturing JIT requires more than just good plants. See the seven zeros. The implementation of this system took Toyota over 30 years to be perfected. However the trend seems to be going towards this system in the United States. The biggest advantage of this system is the reduction in cost of the goods as well as the flexibility in production that help companies be more dynamic and competitive in the industry.
Newsvendor
Name of traditional problem and solution in operations management dealing with single order quantity optimization such as newspaper and other spoilable goods.
Overtime
Work beyond the federally mandated work period usually a day or a week. Overtime pay regulations are quite specific.
MRO
Those components and parts not associated with the direct material for a product. Tools, gloves, lubricants, machine maintenance parts are part of MRO.
RONA
Return on average assets- this measure is usually applied to plant or divisional operations to compare returns without considering debt.