What is the definition of "specification limit"?
The allowable range a product can deviate from the customer's requirements for the product. Correcting production problems at the source of manufacturing keeps a product within its designated specification limits.

Learn more about specification limit in the class Managing Practices for Total Quality 320 below.


Quality Training


Class Information
Quality Training Tooling U-SME classes are offered at the beginner, intermediate, and advanced levels. The typical class consists of 12 to 25 lessons and will take approximately one hour to complete.
Class Name:Managing Practices for Total Quality 320
Description:This class discusses management roles and business categories for TQM, processes used to implement TQM, and methods of measuring TQM results.
Prerequisites: 900255 
Difficulty:Advanced
Number of Lessons:14
Language:English, Spanish
 
Go to Catalog

Class Outline
  • Objectives
  • TQM as a System
  • TQM and the Industrial Cycle
  • Management Roles for Total Quality Control
  • Incoming-Material Control: Vendors
  • Incoming-Material Control: Acceptance Sampling
  • Types of Sampling Tables
  • Product Control
  • Special Process Studies
  • Key Areas for Measuring Product Quality
  • Methods of Measuring TQM Results
  • Performance Measure Feedback Parameters
  • MPM: Operational Control and Strategic Control
  • Summary
  
Class Objectives
  • Describe the role of TQM in today's industries.
  • Distinguish between stages of the industrial cycle.
  • Distinguish between management roles for total quality control.
  • Describe the role of vendors in incoming-material control.
  • Describe acceptance sampling.
  • Distinguish between an AQL table, an LQL table, and an AOQL table.
  • Describe product control.
  • Describe special systems studies.
  • Describe key areas for measuring product quality.
  • Distinguish between methods used to measure results of TQM.
  • Describe MPM feedback parameters.
  • Describe how MPM improves operational control and strategic control.

Class Vocabulary

Vocabulary TermDefinition
100 percent inspection Inspection of each unit of incoming material individually. 100 percent inspection is time-consuming and costly.
acceptable quality level AQL. The maximum percentage of nonconforming units of incoming material that remains acceptable for the process average.
acceptance sampling Inspection of a batch of material from a lot to determine whether to accept that lot.
administrative Activities relating to overseeing the planning, organizing, and directing of a program or process.
administrative system Management process used to oversee and execute activities within a company. Systems management is typically involved in executing an administrative system.
AOQ Average outgoing quality. The expected average quality of products accepted for production.
AOQL Average outgoing quality limit. The maximum predicted average quality level of products accepted for production after inspection over all levels of incoming quality of materials.
AOQL sampling table Used for acceptance sampling, table that demonstrates that the average outgoing quality will not be lower than the AOQL value.
AQL Acceptable quality level. The maximum percentage of nonconforming units of incoming material that remains acceptable for the process average.
AQL sampling table Used for acceptance sampling, table that shows the probability of nonconforming incoming units being accepted for production.
audit An examination of a company's activities or products to determine if a company is doing what it says it is doing. Audits are often used to measure the effectiveness of a TQM system.
average outgoing quality AOQ. The expected average quality of products accepted for production.
average outgoing quality limit AOQL. The maximum predicted average quality level of products accepted for production after inspection over all levels of incoming quality of materials.
case studies In-depth examinations of one situation in order to fully understand the complexity of the issues within that situation. Under a TQM system, case studies are often used as part of special systems studies.
CNC machine A machine controlled by a computer that performs a series of operations by reading through a program and executing its instructions. Under a TQM system, product control tests CNC machines to determine their effectiveness.
engineering The stage within a company responsible for creating the design specifications of a product. Engineering uses a product's marketing assessment to create product specifications.
incoming-material control Management role typically part of a TQM system that is involved with checking that the quality of incoming materials conforms to specified quality requirements.
industrial cycle Manufacturing process a product undergoes in production before a consumer can use the product. A TQM system is embedded in each stage of the industrial cycle.
inspection The testing of a part to ensure that it meets its design specifications. Under a TQM system, inspecting incoming material is commonly done through acceptance sampling.
installation The stage within a company responsible for correctly setting up a product for consumer use. Installation is also responsible for repairing a product when necessary.
job lot A group of identical or similar parts made in the machine shop. Acceptance sampling examines a batch of materials from a job lot.
limiting quality level LQL. The percentage of nonconforming units with limited probability of acceptance.
lot A group of identical or similar parts or materials. Acceptance sampling examines a batch of materials from a lot.
LQL Limiting quality level. The percentage of nonconforming units with limited probability of acceptance.
LQL sampling table Used for acceptance sampling, table that shows the probability of nonconforming units being rejected after production.
manufacturing engineering The stage within a company responsible for selecting processes and tools necessary to make a product.
manufacturing performance measurement MPM. Practice of using performance measures to measure the degree to which a company has successfully implemented a TQM system.
manufacturing supervising The stage within a company responsible for overseeing the production and assembly of a product.
marketing The stage within a company that focuses on selling products to a consumer and encouraging sales. Under a TQM system, marketing involves assessing the level of product quality a consumer wants within the consumer's specified price range.
mechanical inspection The department within a company responsible for examining and testing a product to ensure it meets specifications created by engineering.
MPM Manufacturing performance measurement. Practice of using performance measures to measure the degree to which a company has successfully implemented a TQM system.
nonconforming Failing to meet one or more specified quality requirements. Sampling tables typically determine which incoming materials are nonconforming.
OC Operating characteristic. Relationship between the percentage of nonconforming incoming materials and the probability of acceptance of incoming materials. OC is represented by a curve on a graph.
operating characteristic OC. Relationship between the percentage of nonconforming incoming materials and the probability of acceptance of incoming materials. OC is represented by a curve on a graph.
operational control Process of overseeing and maintaining the quality of activities on the shop floor. MPM provides feedback that increases operational control.
performance measure An indicator used to objectively measure the degree to which a company has successfully implemented a TQM system.
process average Mean value of quality per lot of materials. AQL is the maximum percentage of nonconforming units of incoming material that remains acceptable for the process average.
product control Management role typically part of a TQM system that is involved with keeping products within designated specification limits.
purchasing The stage within a company responsible for the acquisition of parts and raw materials for production. Under a TQM system, purchasing primarily involves selecting and retaining vendors for materials necessary to make a product.
quality cost Cost incurred by a company to ensure that a product meet a consumer's requirements. TQM is designed to provide product quality at full customer satisfaction and lowest quality cost.
sampling table A set of procedures that relates lot sizes, batch sizes, and acceptance criteria. Sampling tables are used for acceptance sampling.
shipping The stage within a company responsible for packaging and transporting a product to a consumer.
SPC Statistical process control. Practice of tracking production processes by providing charts, maps, and graphs to display statistical information.
special process studies Process that involves investigating and performing tests to locate the source of the quality problem.
special systems studies Management role typically part of a TQM system that is involved with investigating and performing tests to locate the source of a quality problem.
specification limit The allowable range a product can deviate from the customer's requirements for the product. Correcting production problems at the source of manufacturing keeps a product within its designated specification limits.
statistical process control SPC. Practice of tracking production processes by providing charts, maps, and graphs to display statistical information.
strategic control Process of examining how the outcome of each key TQM process affects overall organizational profitability. MPM provides feedback that increases strategic control.
subassemblies Components that have gone through the assembly process, but are also used in the assembly of other products. Subassemblies must be inspected to check their quality.
systems economics Measuring, controlling, and allocating company resources at lowest quality cost and full customer satisfaction.
systems engineering The technical designing and structuring of a TQM system. Systems engineering incorporates the activity of people, machines, and information.
systems management The execution of the administrative process to ensure effective operation of the TQM system.
systems measurement Evaluating the effectiveness of a TQM system, often through periodically auditing various parts of the system.
total quality A management system designed to integrate efforts of all employees within a company in order to continuously improve product quality and achieve consumer satisfaction.
total quality control Process of integrating each stage of the industrial cycle. Various management roles assist in achieving total quality control.
total quality management TQM. An administrative approach centered around consistent customer satisfaction and continuous improvement of product quality. Under TQM, quality becomes the focus of the design, creation, marketing, and maintenance of each product.
TQM Total quality management. An administrative approach centered around consistent customer satisfaction and continuous improvement of product quality. Under TQM, quality becomes the focus of the design, creation, marketing, and maintenance of each product.
vendor A company or person that sells goods or services to another company. Maintaining relationships with vendors is an important aspect of an effective TQM system.