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There are currently 103 CiCC in this directory beginning with the letter T.
T

t distribution
A statistical distribution used in hypothesis testing when sample sizes are small or population standard deviation is unknown.

t test
A statistical test assessing if means of two groups are significantly different from each other.

t value
The calculated value from a t-test indicating the difference between groups' means relative to their standard deviation.

T-test
T-test: A method to assess whether the means of two groups are statistically different from each other.

Tagging
The process of assigning tags or labels to items, data, or content for organization, identification, or retrieval purposes.

Taguchi
Genichi Taguchi (1924-2012) from Japan is one of the pioneers and important figures in quality science. His core activities were the “quality loss function“ and “experimental design“, also known as “design of experiments“.

Taguchi design
Experimental designs developed by Genichi Taguchi emphasizing robustness against variations in manufacturing processes.

Taguchi Loss Function
A mathematical model emphasizing the cost of deviation from the target value in quality and manufacturing processes.

Taguchi Method
An approach to engineering and quality improvement focusing on minimizing variation and achieving robust product design.

Taguchi Methods
Taguchi Methods: The American Supplier Institute’s trademarked term for the quality engineering methodology developed by Genichi Taguchi. In this engineering approach to quality control, Taguchi calls for off-line quality control, on-line quality control and a system of experimental design to improve quality and reduce costs.

Takt time
Takt time: The rate of customer demand, takt time is calculated by dividing production time by the quantity of product the customer requires in that time. Takt is the heartbeat of a lean manufacturing system. Also see “cycle time.”

Tampering
Tampering: Action taken to compensate for variation within the control limits of a stable system; tampering increases rather than decreases variation, as evidenced in the funnel experiment.

Tan
A mathematical function representing the tangent of an angle in trigonometry.

Target costing
Cost planning system. The planned values are derived on the basis of prices that can be obtained on the market. It is important to know the customer expectations with regard to price and quality in order to break down the allowed costs (target costs).

Target value
The desired or optimal value set as a goal or reference point in various processes or activities.

Targeted sampling
Withdrawal of certain representative sub-quantities (samples) from a sampling unit. Here, a decision was made on the basis of information known in advance to take exactly these sub-quantities into consideration in the sampling. (On the basis of DIN 55350-14)

Task
Task: A specific, definable activity to perform an assigned piece of work, often finished within a certain time.

Task forces
Concept from the military sector. It is also used for project groups that are deployed to solve problems.

Task management
The process of planning, organizing, and executing tasks or activities to achieve specific goals or objectives.

TAT
Turn Around Time

Taylorism
A methodology for breaking up workflows into smaller units to increase efficiency and effectiveness. Named after its founder, Fredrick Winslow Taylor (1856–1915).

TC
Technical Committee. Workgroup at the ISO for standards. See ISO/TC 176.

TCS
Total Customer Satisfaction.

TD
Potentially context-dependent, referring to different meanings or uses based on specific contexts or industries.

Team
Team: A group of individuals organized to work together to accomplish a specific objective.

Technical expert
Person who provides the audit team with special knowledge or expertise. This can be special knowledge or expertise regarding the organization, the process, the product, the service, the activity to be audited, the language or the culture. A technical expert is not an auditor in the audit team. (On the basis of ISO 19011:2018)

Technical report (TR)
Technical report (TR): A type of document in the International Organization for Standardization portfolio of deliverables.

Technical rules
Recommendations, action guidelines or suggestions that demonstrate how laws, ordinances and technical facts can be implemented. Some examples of technical rules are DIN standards, VDE provisions, and VDI guidelines. They are essentially used to secure life, health and material goods, to protect the environment, and to ensure the quality of products and services.

Technical specification (TS)
Technical specification (TS): A type of document in the International Organization for Standardization portfolio of deliverables.

Test
Characteristic values of one or more characteristics that are determined according to a procedure. (On the basis of ISO 9000:2015)

Test for special causes
A procedure or analysis used to identify exceptional or non-routine factors influencing process variation.

Test of equal variances
A statistical test assessing if two sample variances are significantly different from each other.

Test R squared
A statistical measure assessing the proportion of variance explained by predictors in a regression model.

Test statistic
A value calculated from sample data used in statistical hypothesis testing to make inferences about population parameters.

TGA
Trägergemeinschaft für Akkreditierung GmbH, Frankfurt. The accreditation assignments were combined in a new structure in the DAkkS as Germany‘s national accreditation body as of January 1, 2010. The TGA entered the DAkkS via the DGA.

THA’s
Potentially an abbreviation or reference to specific practices or procedures, context-dependent.

The Joint Commission
The Joint Commission: A U.S. healthcare accreditation body; formerly known as Joint Commission for the Accreditation of Healthcare Organizations.

Theory of constraints
This theory, which was developed by the American physicist Goldratt, says that each system is limited in its performance by at least one element. The system‘s overall performance can only be improved over the long term by considering it as a whole.

Theory of constraints (TOC)
Theory of constraints (TOC): A lean management philosophy that stresses removal of constraints to increase throughput while decreasing inventory and operating expenses. TOC’s set of tools examines the entire system for continuous improvement. The current reality tree, conflict resolution diagram, future reality tree, prerequisite tree and transition tree are the five tools used in TOC’s ongoing improvement process. Also called constraints management.

Third party audit
Audit by external, independent organizations such as certification or accreditation companies, for example. (On the basis of ISO 9000:2015)

Throughput
Throughput: The rate the system generates money through sales, or the conversion rate of inventory into shipped product.

Throughput yield
In contrast to the term yield, throughput yield takes into account rework of nonconforming parts during production and does not include the reworked parts in the figure. Throughput yield accordingly determines the number of conforming parts without rework in the upstream process steps. Throughput yield is also called the first pass rate, which means the number of parts/products that pass through production in one pass (without rework).

Ticks
Marks or divisions along an axis indicating specific points or intervals in a graphical representation.

Time from text TIME
Potentially a reference to extracting time-related information from text or data containing timestamps.

Time series
A sequence of data points measured or recorded at successive time intervals, often used for forecasting and analysis.

Time series plot
A graphical representation displaying time-based data points or observations, showing trends or patterns over time.

Time to market
Time from the origination of a product idea until the finished product is introduced on the market. Reducing this time (product innovation, development, production, market launch, and marketing) is a crucial factor for competition.

Time-weighted charts
Charts or graphs adjusted to account for the time duration or weighted averages of different time periods.

TL 9000
TL 9000: A quality management standard for the telecommunications industry based on ISO 9000. Its purpose is to define the requirements for the design, development, production, delivery, installation and maintenance of products and services. Included are cost and performance-based measurements that measure reliability and quality performance of the products and services.

ToC
See Theory of constraints.

Today TODAY
Referring to the current day or the present moment.

Tolerance
Tolerance: The maximum and minimum limit values a product can have and still meet customer requirements.

Tolerance interval
A range or span of values within which data points or observations are considered acceptable or valid.

Tolerance zone
Range of permitted characteristic values that are located between the lower and upper limiting values. (On the basis of DIN 55350-12)

Toolbox talks
Short safety discussions or meetings focused on workplace safety, hazards, or specific work-related topics.

Tools of quality
See Quality tools.

Top management
A person or group of people that directs and controls an organization at the highest level. (On the basis of ISO 9000:2015)

Top management commitment
Top management commitment: Participation of the highest level officials in their organization’s quality improvement efforts. Their participation includes establishing and serving on a quality committee, establishing quality policies and goals, deploying those goals to lower levels of the organization, providing the resources and training lower levels need to achieve the goals, participating in quality improvement teams, reviewing progress organization wide, recognizing those who have performed well and revising the current reward system to reflect the importance of achieving the quality goals.

Total productive maintenance
System for maintaining production means. Behind this Japanese concept is the philosophy that the machine operator has a certain responsibility for the functionality of his/her workplace. This includes machines, tools and maintenance activities.

Total productive maintenance (TPM)
Total productive maintenance (TPM): A series of methods, originally pioneered by Nippondenso (a member of the Toyota group), to ensure every machine in a production process is always able to perform its required tasks so production is never interrupted.

Total quality
Total quality: A strategic integrated system for achieving customer satisfaction that involves all managers and employees, and uses quantitative methods to continuously improve an organization’s processes.

Total quality control
Quality strategy that comprises the entire company and that targets the customer needs. See Feigenbaum.

Total quality control (TQC)
Total quality control (TQC): A system that integrates quality development, maintenance and improvement of the parts of an organization. It helps an organization economically manufacture its product and deliver its services.

Total Quality Management
A concentrated focus of all company activities on (absolute) quality and dependability from the customer‘s point of view in line with the other corporate objectives. In particular, it strives for: an optimal competitive situation through improvement of the quality of products and services; improvement of the relation between costs and earnings; and greater employee commitment and qualification. This involves an analysis of the actual state, the detection of weaknesses until they have been completely eliminated, the continuous commitment to improvement in the entire company, and a systematic structuring of environmental relationships (natural and social environments). Success by means of TQM is based on the use of systematic methods and tools and the active participation of all employees. This total quality management definition makes it clear that it is more than just a corporate philosophy that has to be put into practice in order to motivate its implementation.

Total quality management (TQM)
Total quality management (TQM): A term first used to describe a management approach to quality improvement. Since then, TQM has taken on many meanings. Simply put, it is a management approach to long-term success through customer satisfaction. TQM is based on all members of an organization participating in improving processes, products, services and the culture in which they work. The methods for implementing this approach are found in the teachings of such quality leaders as Philip B. Crosby, W. Edwards Deming, Armand V. Feigenbaum, Kaoru Ishikawa and Joseph M. Juran.

Total Recordable Injury Frequency Rate (TRIFR)
A safety metric measuring the total number of work-related injuries per million hours worked.

Total time on test plot
A graphical representation displaying the total time a system or component is under observation or testing.

Toyota Production System
A management philosophy and production system developed by Toyota, emphasizing efficiency, quality, and continuous improvement.

Toyota production system (TPS)
Toyota production system (TPS): The production system developed by Toyota Motor Corp. to provide best quality, lowest cost and shortest lead time through eliminating waste. TPS is based on two pillars: just-in-time and jidohka (see listings). TPS is maintained and improved through iterations of standardized work and kaizen (see listing.)

TPM
See Total productive maintenance.

TPM – 5S
Total Productive Maintenance - 5S, an approach combining TPM principles with the 5S methodology for workplace organization.

TPM Cell
A dedicated area or section within a facility implementing Total Productive Maintenance practices.

TPM COP Kaizen Database
A database or repository housing continuous improvement (Kaizen) initiatives related to Total Productive Maintenance.

TPM Loss
Refers to losses or inefficiencies targeted for improvement in Total Productive Maintenance strategies.

TPM Pillar
A fundamental element or principle within the Total Productive Maintenance framework.

TPM SA
Total Productive Maintenance - Safety and Autonomous Maintenance, integrating safety practices with TPM initiatives.

TPOC
Potentially an acronym or abbreviation with context-specific meaning or significance.

TPS
Toyota Production System.

TQC
See Total quality control.

TQM
See Total quality management.

Traceability
Possibility to trace the history, application or location of the object that is being considered. Traceability of a product can refer to the origin of materials and parts, the processing sequence, or the distribution or location of the product after delivery. (On the basis of ISO 9000:2015)

Traditional Manufacturing
Conventional or older methods and practices in manufacturing before the adoption of modern or lean production techniques.

Transaction data
Transaction data: The finite data pertaining to a given event occurring in a process. Examples are the data obtained when an individual checks out groceries (the grocery shopping process) and the data obtained from testing a machined component (the final product inspection step of the production process).

Transportation
The movement or transfer of goods, materials, or people from one place to another within a supply chain or logistics system.

Treatments
Specific factors, conditions, or interventions applied or studied in an experiment or research setting.

Tree diagram
Tree diagram: A management tool that depicts the hierarchy of tasks and subtasks needed to complete an objective. The finished diagram bears a resemblance to a tree.

Trend
Trend: The graphical representation of a variable’s tendency, over time, to increase, decrease or remain unchanged.

Trend control chart
Trend control chart: A control chart in which the deviation of the subgroup average, X-bar, from an expected trend in the process level is used to evaluate the stability of a process.

Triangular distribution
A probability distribution characterized by a triangular shape, defined by minimum, maximum, and most likely values.

Trimmed Mean
A statistical measure calculated by excluding a certain percentage of data points from both ends of a distribution.

TRIZ
TRIZ: A Russian acronym for a theory of innovative problem solving.

True value
Value of a quantitative characteristic or quantity. Most of the time, the true value is a theoretical concept and not known exactly. (On the basis of ISO 3534-2)

TS
Technical specification.

Tsquared generalized variance chart
A statistical control chart used for detecting changes in the variance of a process or system over time.

TSSW
Potentially an acronym or abbreviation with context-specific meaning or significance.

TTFF
Time To First Failure (see OTTFF). The operating time until the first failure.

Tukey's method
A statistical method used for analyzing multiple pairwise comparisons in experimental studies, often used after ANOVA.

Turnback
A term potentially associated with processes or actions aimed at reversing or correcting a deviation or error.

Two level factorial
An experimental design considering two levels of each factor, often used to study main effects and interactions between factors.

Type I and II error
Type I error refers to rejecting a true null hypothesis, while Type II error refers to failing to reject a false null hypothesis.

Type I error
Type I error: An incorrect decision to reject something (such as a statistical hypothesis or a lot of products) when it is acceptable.

Type II error
Type II error: An incorrect decision to accept something when it is unacceptable.

Type test
Inspection of a product to test its suitability. (On the basis of DIN 55350-17)
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