Glossary of Key Quality Terms and Definitions
"R-Z"

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Radar Chart See Spider Diagram.
Random Sampling A commonly used sampling technique in which sample units are selected so that all combinations of n units under consideration have an equal chance of being selected as the sample.
Records Information captured on worksheets, forms, and charts.
Red Bead Experiment An experiment developed by W. Edwards Deming to illustrate it is impossible to put employees in rank order of performance for the coming year based on their performance during the past year because performance differences must be attributed to the system, not to employees.
Registrar Accreditation Board (RAB) A board that evaluates the competency and reliability of registrars (organizations that assess and register companies to the appropriate ISO 9000 series standards and to the ISO 14000 environmental management standard). RAB provides ISO course provider accreditation.
Referral Laboratory External laboratory to
which a sample is submitted for a supplementary or confirmatory examination procedure and report.
Requirement A need, expectation, or obligation. It can be stated or implied by an organization, its customers, or other interested parties.There are many types of requirements. Some of these include quality requirements, customer requirements, management requirements, and product requirements.
Review Activity undertaken to determine the suitability, adequacy and effectiveness of the subject matter to achieve established objectives.
Right the First Time
A term used to convey the concept that it is beneficial and more cost effective to take the necessary steps up front to ensure a product or service meets its requirements than to provide a product or service that will need rework or not meet customer needs. In other words, an organization should engage in defect prevention rather than defect detection.
Risk The combination of severity of harm and probability of occurrence of that harm.
Risk Analysis The systematic use of available information to identify hazards and estimate the risk.
Risk Assessment
Identifying potential failure modes, determining severity of consequences, identifying existing controls, determining probabilities of occurrence and detection, and evaluating risks to identify essential control points.
Risk Evaluation
The process of comparing the estimated risk against risk criteria to determine the risk acceptability.
Risk Management
The identification, analysis and economic control of those risks which can threaten the assets or earnings of an enterprise.
Risk Priority Number (RPN) The risk priority number of a failure mode and its effect(s) before improvement.
Root Cause That which has the most impact on the problem being tackled.
Root Cause Analysis A tool designed to help identify not only what and how an event occurred, but also why it happened.

Safety Those processes implemented to protect laboratory workers, visitors, the public, and environment.
Scatter Diagram
A graphical technique to analyze the relationship between two variables. s one of the "seven tools of quality."
SCC
Standards Council of Canada.
Scorecard A scorecard is an evaluation device, usually in the form of a questionnaire, that specifies the criteria customers will use to rate your business's performance in satisfying their requirements.
Seven Tools of Quality Tools that help organizations understand their processes to improve them. The tools are the cause and effect diagram, check sheet, control chart, flowchart, histogram, Pareto chart and scatter diagram.
Shall/Should Statements See Quality Management Standards on page J-Q. See Standards Vocabulary.
SHEA Society for Healthcare Epidemiology of America.
SI Units History in Canada: In 1960, the International System of Units was established as a result of a long series of international discussions. This modernized metric system, called SI from the French name le Systeme international d'unites replaced all former systems of measurement, including former versions of the metric system. In 1970, The White Paper on Metric Conversion in Canada was tabled in the House of Commons by the Minister of Industry, Trade and Commerce. One year later (1971) Canada's Weight and Measures Act proclaimed that “all units of measurements used in Canada shall be determined on the basis of the International System of Units.” Since 1972, Sector Committee 9.10 of Metric Commission Canada has been holding quarterly meetings and has decided to unify Canadian medical measurement practices with those of other countries using SI. November 1981 was selected as the start date for conversion in the Canadian health sector.

sigma 's' Denotes standard deviation.
Sigma 'S' Denotes the process Sigma.
SIPOC chart/ diagram A tool used by a team to identify all relevant elements of a process improvement project before work begins. It helps define a complex project that may not be well scoped, and is typically employed at the Measure phase of the Six Sigma DMAIC methodology. It is similar and related to Process Mapping and 'In/Out Of Scope' tools, but provides additional detail. Suppliers (the 'S' in SIPOC) of your process, the Inputs (the 'I') to the process, the Process (the 'P') your team is improving, the Outputs (the 'O') of the process, and the Customers (the 'C') that receive the process outputs. In some cases, Requirements of the Customers can be appended to the end of the SIPOC for further detail.
Six Sigma A quality process that measures defects in parts per million.; stands for Six Standard Deviations (Sigma is the Greek letter “s” used to represent standard deviation in statistics) from mean. Six Sigma methodology provides the techniques and tools to improve the capability and reduce the defects in any process by constantly reviewing and re-tuning the process. To achieve this, Six Sigma uses a methodology known as DMAIC.
Special and Common Cause System of Variation The collection of variables that produce both common cause variation and special cause variation and the interaction of those variables.
Spider Diagram A visual report card for the performance of a number of indicators on a single chart. Also know as a "radar chart" and a "gap analysis" tool, this diagram makes visible the gaps between the current and desired performance.
Standard Standards are documents, most often reached through the process of consensus of expert opinions that have been authorized by recognized bodies as best practices. A document rises to the level of a standard when an agency with authority states that adherence to the document is required to develop and manage materials, products, services, technologies, processes, and systems. See Quality Management Standards.
Standards Vocabulary
Horizontal Standards Horizontal standards are said to be very broad, but not deep or specific on many points.   Horizontal standards tend most commonly to set down principles or systems such as quality management systems.
Vertical Standards Vertical standards are often referred to as technical standards on a specific subject.  They do not tend to cover a broad range of subjects or topics, but provide a large amount of specific detail. 
Normative statements In international standards statements the described required action include the term “shall”.  In less formal standards the word “must” or “required” may be used.
Normative standards may be found in the body of the document or may be within an annex.
Informative statements In all standards, statements that clarify, or give examples, or give caution are usually included.  Such statements are intended to provide information only and are not required to be enacted. 

Statistical Process Control (SPC) A statistical technique used to monitor processes, usually involving the use of control charts. Traditional SPC standards call for improving defect levels measured in percentages (parts per hundred).
Statistical Tools Methods and techniques used to generate, analyze, interpret, and present data.
Supplier Organization or person that provides a product or service.
Survey The act of examining a process or of questioning a selected sample of individuals to obtain data about a process, product or service.
SWOT Analysis
Strengths, Weaknesses, Opportunities, Threats. SWOT analysis headings provide a good framework for reviewing strategy, position and direction of a company or business proposition, or any idea.

TDG Transportation of Dangerous Goods.
TDGR Transportation of Dangerous Goods Regulations. Learn about the Transport of Dangerous Goods Act from Transport Canada .
Team A group of individuals organized to work together to accomplish a specific objective.
Test Determination of one or more characteristics according to a procedure.
Theory of Constraints (TOC) Also called constraints management, it is a set of tools that examines the entire system for continuous improvement. The current reality tree, conflict resolution diagram, future reality tree, prerequisite tree and transition.
Time to Result
Length of time that a sample’s first result may be issued orally (e.g. telephoned) or written (e.g. faxed) to the ordering physician.
Total Quality Management Any management system that addresses all areas of an organization, emphasizes customer satisfaction, and uses continuous improvement methods and tools.
Toyota Production System see LEAN. Traceability Ability to trace the history, application or location of that which is under consideration. Task: A specific, definable activity to perform an assigned piece of work, often finished within a certain time.
Tree Diagram A tool to expand a proposed change from a general idea to a specific series of concepts or actions. Used to systematically map out in increasing detail the full range of paths and tasks that need to be accomplished to achieve a primary goal and related sub-goals.
Turn Around Time Length of time that a sample’s final result may be issued to the ordering physician.

Ultimate Customer The person or unit who receives the output from a series of processes and for whom these processes are designed. Without the ultimate customer, there would be no need for the intermediate processes to exist.
Unfreezing Reassessing old values and behaviors and becoming open to the acceptance of a new culture.
Universal Precautions An approach to infection control in which all human blood and certain human body fluids are treated as if known to be infectious for HIV, HBV, and other blood-borne pathogens.

Validation Confirmation, through the provision of objective evidence, that the requirements for a specific intended use or application have been fulfilled.
Value Added The parts of the process that add worth from the perspective of the external customer.
Value Based Management (VBM) A series of measures of companywide adherence to defined values, as opposed to result-oriented processes.
Verification Confirmation, through the provision of objective evidence, that specified requirements have been fulfilled.
Vision An overarching statement of the way an organization wants to be; an ideal state of being at a future point.
VOC Voice of the customer (Six Sigma)

Waste Any activity that consumes resources and produces no added value to the product or service a customer receives.
Wheel-within-a-Wheel
See nested PDSA.
WHMIS Workplace Hazardous Materials Information System.
Work Environment
All the factors that influence work; these include social, cultural, psychological, physical, and environmental conditions. The term work environment includes lighting, temperature, and noise factors, as well as the whole range of ergonomic influences. It also includes things like supervisory practices as well as reward and recognition programs. All of these things influence how work is performed.
World-class Quality A term used to indicate a standard of excellence: best of the best.

Zero Defects A performance standard and methodology developed by Philip B. Crosby that states if people commit themselves to watching details and avoiding errors, they can move closer to the goal of zero.

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Something Missing? Please help add to the POLQM Glossary by forwarding additional words and definitions focused on Laboratory Quality Management to the Web Manager (quote source whenever possible) .
A Glossary of quality terms is also available on the ASQ web site. It also includes a "Who's Who" of the many individuals who have contributed to Quality Management.
Page created and posted: September 22, 2005; Revised: February 23, 2006