Term Definition Section Source
Acoustic Emission (AE) The phenomenon whereby transient elastic waves are generated by the rapid release of energy from localized sources like places of transient relaxation of stress and strain field Non-Destructive Evaluation  
Air ionizer An air ionizer (or negative ion generator) is a device that uses high voltage to ionize (electrically charge) air molecules Counterfeit Parts
Alphanumeric codes They classify items in detail Shelf Life Control  
ANOVA Analysis of Variance. It's an alternative method to the classic Gauge R&R analysis. Metrology  
Antistatic A compound used for treatment of materials or their surfaces in order to reduce or eliminate buildup of static electricity Counterfeit Parts
Article A unit of hardware or any portion thereof required by the contract. Soldering  
Assembly A functional subdivision of a component, consisting of parts or subassemblies that perform functions necessary for the operation of the component as a whole.  Soldering  
Attribute Analysis Assessment of a measurement system in which the data are attributes of nominal or ordinal scale. Metrology  
Axial Lead Lead wire extending from a component or module body along its longitudinal axis. Soldering  
Barrier, Fire An obstruction (such as a partition) that prohibits or tends to inhibit the propagation of burning. May be internal or external in configuration. Flammability  
Baseline Technical requirements that are related to cost and schedule and are mature enough to be placed under configuration control. Configuration Management  
Beam Attenuation A decrease in light energy from a collimated beam that is passing through a water sample with a specific pathlength. It is an inherent optical property Non-Destructive Evaluation
Beam Spread The angle of divergence from the central axis of an electromagnetic or acoustic beam as it travels through a material Non-Destructive Evaluation
Bias Bias is the difference between the measurement’s average performed by an operator (MA) and a reference value (RV). Metrology  
Bifurcated (split) Terminal A terminal with a slot or split opening in which conductors are placed before soldering. Soldering  
Birdcage A defect in stranded wire where the strands in the stripped portion between the covering of an insulated conductor and a soldered connection (or an end-tinned lead) have separated from the normal lay of the strands. Soldering  
Blister Raised areas on the surface of the laminate caused by the pressure of volatile substances entrapped within the laminate. Soldering  
Blow Hole A cavity in the solder surface whose opening has an irregular and jagged form, without a smooth surface. Soldering  
Boroscope Optical instruments designed for remote viewing of objects Non-Destructive Evaluation  
Break, Fire A gap, opening, or nonflammable material between flammable materials which would prevent propagation of burning.  Flammability  
Bridging A buildup of solder between components, conductors, and/or base substrate forming an undesired conductive path. Soldering  
Broker An individual or party (brokerage firm) that arranges transactions between a buyer and a seller, and gets a commission when the deal is executed Counterfeit Parts
Capillary action The ability of a liquid to flow in narrow spaces without the assistance of, and in opposition to external forces like gravity Non-Destructive Evaluation
Certification The act of verifying and documenting that personnel have completed required training and have demonstrated specified proficiency and have met other specified requirements. Soldering  
Circumferential Separation A crack or void in the plating extending around the entire circumference of a PTH, or in the solder fillet around the conductor, in the solder fillet around an eyelet, or at the interface between a solder fillet and a land. Soldering  
Code 0 Identifies items not included in the shelf life program Shelf Life Control  
Code X Used to identify critical end-use items, military-essential items, and medical items with a shelf life greater than 60 months. A critical end-use item is any item that is essential to the preservation of life in emergencies or any item essential to the performance of a major system. Shelf Life Control  
Cold Flow Movement of insulation (e.g. Teflon) caused by pressure. Soldering  
Cold Solder Connection A solder connection exhibiting poor wetting and a grayish, porous appearance due to insufficient heat, inadequate cleaning before to soldering, or excessive impurities in the solder. Soldering  
Component A functional subdivision of a system, generally a self-contained combination of assemblies performing a function necessary for the system's operation. Soldering  
Conduction Soldering Method of soldering which employs a soldering iron for transfer of heat to the soldering area. Soldering  
Conductor A lead, solid or stranded, or printed wiring path serving as an electrical connection. Soldering  
Configuration Accounting Maintaining, correlating, releasing, reporting and storing configuration data. Configuration Management  
Configuration Control Act of controlling baseline changes through configuration control boards. Configuration Management  
Configuration Identification Creating, documenting and releasing the documentation describing the baseline and how changes will be controlled and released. Configuration Management  
Configuration Management Discipline of identifying and formalizing the functional and physical characteristics of a configuration item at discrete points in the product evolution for the purpose of maintaining the integrity of the product system and controlling changes to the baseline. Configuration Management  
Configuration Management This is the task of properly keeping configuration for software, processes, documents, hardware and firmware for all elements of a system System Engineering  
Configuration Verification Process of verifying that resulting products conform to the intentions of the designers and to the standards established by preceding approved baselines, and that baseline documentation is current and accurate. Configuration Management  
Conformal Coating A thin electrically non-conductive protective coating that conforms to the configuration of the covered assembly. Soldering  
Connection An electrical termination that was soldered. A solder joint. Soldering  
Containers, Sealed Containers that are enclosed adequately enough to preclude the replenishment of a combustible atmosphere under conditions of a fire Flammability  
Containers, Vented Containers that are unsealed and permit atmosphere exchange. Flammability  
Containment, Fire The situation in which a fire and/or burning particles do not progress, in any manner, beyond the confines of a configuration. Flammability  
Contaminant An impurity or foreign substance present in a material that affects one or more properties of the material. A contaminant may be either ionic or nonionic. An ionic, or polar compound, forms free ions when dissolved in water, making the water a more conductive path. A non-ionic substance does not form free ions, nor increase the water's conductivity. Ionic contaminants are usually processing residue such as flux activators, finger prints, and etching or plating salts. Soldering  
Control To take action to keep a situation in a certain desired state FMEA  
Contruction Analysis The process of destructively disassembling, testing, and inspecting a device for the purpose of determining conformance with applicable design, process, and workmanship requirements. This process is also known as Destructive Physical Analysis (DPA). Soldering  
Cost of Poor Quality (COPQ) Annual monetary loss of products and processes that are not achieving their associated quality objectives Quality Planning  
Cost of Poorly Performing Processes (COP) see Cost of Poor Quality (COPQ) Quality Planning  
Counterfeit Parts A part made or altered so as to imitate or resemble an approved part without authority or right, and with the intent to mislead or defraud by passing the imitation as original or genuine. Counterfeit parts  
Crazing An internal condition occurring in the laminate base material in which the glass fibers are separated from the resin. Soldering  
Cup Terminal A hollow, cylindrical terminal to accommodate one or more conductors. Soldering  
Delamination A separation between plies within a base material or any planar separation within a multilayer PWB. Soldering  
Demerit A mark usually entailing a loss of privilege given to an offender  Non-Destructive Evaluation
Deviation The action of departing from an established course or accepted standard Process Control Google Dictionary
Deviation A specific authorization, granted before the fact, to depart from a particular requirement of specifications or related documents. Soldering  
Dewetting The condition in a soldered area in which the liquid solder has not adhered intimately, but has receded, characterized by an abrupt boundary between solder and conductor, or solder and terminal/termination area leaving irregularly shaped mounds of solder separated by areas covered with a thin solder film. Soldering  
DFMEA Design FMEA. Evaluates what can go wrong with a product during its use and manufacturing as a consequence of a design weakness. FMEA  
Distance Maximize personnel distance. The radiation intensity decreases with distance on the basis of inverse square law. Therefore equipment design and operating procedure must take into account this factor. Non-Destructive Evaluation  
Disturbed Solder Joint Unsatisfactory connection resulting from relative motion between the conductor and termination during solidification of the solder. Soldering  
Dross Oxide and other contaminants that form on the surface of molten solder. Soldering  
Eddy Current Testing (ECT) Uses electromagnetic induction to detect flaws in conductive materials Non-Destructive Evaluation
Eddy currents Oscillating electrical currents induced in a conductive material by an alternating magnetic field, due to electromagnetic induction Non-Destructive Evaluation  
Egress An opening that provides a pathway from the interior of an enclosed space. Soldering  
Electromagnetic Testing As a form of nondestructive testing, is the process of inducing electric currents or magnetic fields or both inside a test object and observing the electromagnetic response. If the test is set up properly, a defect inside the test object creates a measurable response. Non-Destructive Evaluation
Electrostatic discharge The transfer of charges between bodies at different potentials caused by direct contact or induced by a charged field Counterfeit Parts  
Embrittlement A loss of ductility of a material, making it brittle. Fasteners google
Emissivity The ratio of the radiance of a body at a given temperature to the corresponding radiance of a black body at the same temperature Non-Destructive Evaluation  
Encapsulating Compound An electrically nonconductive compound used to completely enclose and fill in voids between electrical components or parts. Soldering  
Excessive Solder Joint Unsatisfactory solder connection wherein the solder obscures the configuration of the connection. Soldering  
Eyelet A hollow tube inserted in a terminal or PWB to provide mechanical support for component leads or for electrical connection. Soldering  
Failure cause What induces the failure FMEA  
Failure effect The consequence of the failure FMEA  
Failure mode The way in which the failure is manifested FMEA  
Fastener An item such as a bolt (could be a tensile or shear bolt, shoulder bolt, screw, HiLok®, HiTigue®, or lockbolt), nut, nut plate or anchor nut, rivet, shear pin, helical or cylindrical insert, setscrew, washer, safety wire, cotter pin, etc., which joins or retains components or structural elements Fasteners  
Fillet A smooth concave buildup of material between two surfaces; e.g., a fillet of solder between a conductor and a solder pad or terminal. Soldering  
Flammability The quality of being easily ignited and burning rapidly Flammability
Flashpoint A point at which someone or something bursts suddenly into action or being Flammability
Flatpack A part with two straight rows of leads (normally on 0.050 inch centers) that are parallel to the part body. Soldering  
Flux A chemically-active compound which, when heated, removes minor surface oxidation, minimizes oxidation of the basis metal, and promotes the formation of an intermetallic layer between solder and basis metal. Soldering  
FMEA Failure Mode and Effects Analysis. Systematized group of activities designed to recognize and evaluate the potential failure of a product or process and its effects. FMEA  
FOD Prevention Program A formal, documented, disciplined program designed to prevent FOD caused by events or conditions under control of the contractor. FOD  
Foreign Object Damage Damage that is attributed to foreign object debris. FOD  
Foreign Object Debris A substance, debris or any item that may cause harm to a system. FOD  
Fractured Solder Joint A joint showing evidence of cracking, resulting from movement between the conductor and termination, after solidification of the solder. soldering  
Gauge A gauge is defined as a measuring instrument for measuring and indicating a quantity. Metrology  
Haloing Mechanically-induced fracturing or delaminating on or below the surface of the base. Soldering  
HAZMAT Hazardous Material Shelf Life Control  
Heat Sink A structure or panel of high thermal conductivity in intimate contact with a burning material which extracts sufficient heat by conduction to lower the temperature below the ignition point and extinguish burning. An effective heat sink could limit initial ignition.  Flammability  
Histogram A vertical bar chart that depicts frequencies of numerical data. Quality Planning  
Holographic Interferometry A technique which enables static and dynamic displacements of objects with optically rough surfaces to be measured to optical interferometric precision (i.e. to fractions of a wavelength of light) Non-Destructive Evaluation
Holography The study or production of holograms Non-Destructive Evaluation  
Hook Terminal A type of connector similar to a ring terminal that has a slot cut out of it giving a hook-like appearance Soldering
Hook Terminal A terminal formed in a hook shape. Soldering  
Human Factors Engineering This task analyzes the induced stress (physically and emotionally) during operation and support of a system System Engineering  
Ignition Source A source of heat sufficiently intense and localized to induce combustion. For flammability consideration, any electrical wire or elevated temperature component is considered an ignition source. Monopropellants, strong oxidizers, bases, etc. must also be considered.  Flammability  
Inspection Inspection for acceptability shall be performed on all solder connections, parts mounting and condition, conductor routing, and PWB features to requirements Soldering  
Insufficient Solder Connection A solder connection characterized by incomplete coverage of one or more of the metal surfaces being joined or by incomplete solder fillets. Soldering  
Interfacial Connection A conductor that connects conductive patterns between opposite sides of a PWB. Soldering  
Interlayer Connection An electrical connection between conductive patterns in different layers of a PWB. Soldering  
Internal Audit It is a type of an audit that is conducted within an organization by an auditor appointed by that organization. Quality Planning  
Inventory Control A broad field that maintains appropriate supply of products against the product demand Shelf Life Control  
Ionizer A device that produces ionization, esp. one used to improve the quality of the air in a room Counterfeit Parts  
Joint A solder joint; a termination. Soldering  
Large heavy duty DC equipment Heavy duty stationary equipment units are powered through direct current designed for application of MPT for the inspection of very large and sophisticated castings. Current values as high as 20,000 amperes are delivered. Such high currents are needed to magnetize an entire casting which may weigh tons. Non-Destructive Evaluation  
Large potable equipment Large potable equipment is used when higher power is required or heavier duty cycles make small kits inadequate. Large units with output up to 6000 amperes are available. Non-Destructive Evaluation  
Lead A heavy, bluish-gray, soft, ductile metal, the chemical element of atomic number 82. It has been used in roofing, plumbing, ammunition, storage batteries, radiation shields, etc., and its compounds have been used in crystal glass, as an antiknock agent in gasoline, and (formerly) in paints Soldering google dictionary
Leak Testing A test to detect leaks and determine the rate at which a liquid or gas will penetrate from inside a tight component or assembly to the outer regions or vice versa as a result of differential pressure between the two regions Non-Destructive Evaluation  
Lefted Land A land that has lifted or separated from the base material, whether or not any resin is lifted with the land. Soldering  
Linearity The change in bias with respect to the units’ variation of the characteristic being measured. Metrology  
Liquid Penetrant Test A widely applied and low-cost inspection method used to locate surface-breaking defects in all non-porous materials (metals, plastics, or ceramics) Non-Destructive Evaluation
Lockbolts High strength fastener that has either a swaged collar or a type of threaded collar to lock it in place  Fasteners  
Locknut A nut designed so that, once tightensed, it cannot be accidentally loosened Fasteners google
Long Distance Microscope (LDM) This equipment enables the user to obtain microscopic inspection of objects at relatively long distances Non-Destructive Evaluation  
Lubricant A substance used for minimizing friction Fasteners google
Manufacturer A business engaged in manufacturing some product Counterfeit Parts
Measling Discrete white spots below the surface of the base material, usually caused by moisture, pressure, and/or thermally induced stress. Soldering  
Metal whiskering or Tin whiskers A phenomenon or fault which occurs in electrical devices. It is noticed that small metal hairs grew between metal solder pads causing short circuits Soldering  
Microgravity A condition, especially in space orbit, where the force of gravity is so weak that weightlessness results Flammability
Minimum detectable leak Smallest detectable fuild flow rate Non-Destructive Evaluation  
Mission A statement of the organization’s purpose and its scope of operations. Quality Planning  
Mission Essential Support Equipment Equipment used in a closed loop with the system, where failure of this equipment would degrade the mission or imperil personnel. This category includes items of ground support equipment whose functions are necessary to support the count down phase and those items of ground support equipment used in pre-count down phases whose problems can create a safety hazard, cause damage to flight hardware, or inability to detect a problem on the flight hardware. Soldering  
Neutron Radiography The process by which film is exposed by first passing neutrons through an object to produce a visible image of the materials that make up the object Non-Destructive Evaluation
Nick A cut or notch on a conductor. Soldering  
Nominal scale Observations classified into two or more non-ordered categories to assess a characteristic such as a preferred political party, supermarket, and so on. A specific case is based on the binary scale: defective, non-defective, success or failure, etc. Metrology  
Non-conformance A failure to conform or act in accordance with established standards Process Control
Non-Destructive Evaluation (NDE) or Non-Destructive Testing (NDT) The technique of applying physical principles to determine the characteristics of materials, components, or systems Non-Destructive Evaluation  
Nonferrous metals Metals that have no to very little iron content Soldering  
Nonflammable Not combustible or easily set on fire Flammability
Nonwetting A condition whereby a surface has contacted molten solder, but the solder has not adhered to all of the surface; basis metal remains exposed. Soldering  
Offgassing The release of volatile parts from a substance when placed in a vacuum environment that may affect crew members. Soldering  
Ordinal scale Observations classified into three or more ordered categories to assess a characteristic like annual income, a service evaluation, whether the scale is numeric or not. Metrology  
Outgassing The release of volatile parts from a substance when placed in a vacuum environment. Soldering  
Overheated Joint An unsatisfactory solder joint, characterized by rough solder surface; dull, chalky, grainy, porous or pitted Soldering  
Pad A portion of a conductive pattern used as a soldering area. Also called a land. Soldering  
Part An element of a component, assembly, or subassembly that is not normally subject to further subdivision or disassembly without destruction of designed use. Soldering  
Part Lead The solid conductor attached to a part. Soldering  
PFMEA Process FMEA. Evaluates what can go wrong with a product during its manufacturing as a result of not complying with the original design or failing to meet design specifications. FMEA  
Pierced (Perforated) Terminal A terminal containing a hole through which conductors are placed before soldering. Soldering  
Piezoelectric Crystal A crystal that can be used as a transducer Non-Destructive Evaluation
Pinhole A solder connection with a small hole penetrating from the surface of the solder to a void of indeterminate size within the solder connection. Soldering  
Pit A relatively small recess in the solder surface, the bottom of which is visible from all angles of vision. Soldering  
Planar defect also known as area defect; basically an array of dislocations Non-Destructive Evaluation
Pleated-Through-Hole A plated-through hole is one formed by a deposition of metal on the inside surface of a through-hole. Also known as a supported hole. The configuration is used to provide additional mechanical strength to the soldered termination or to provide an electrical interconnection on a multilayer PWB. Soldering  
Porous Solder Joint A joint having a grainy or gritty surface. Soldering  
Positive Igniters Igniters that produce a controlled flame.  Flammability  
Potential FOD The as-found condition where a FO is in a position to cause damage should the product be put into use. FOD  
Potting Compound An electrically nonconductive compound used to partially encapsulate or for a filler between parts, conductors, or assemblies. Soldering  
Precision Precision is defined as the quality of being reproducible.obtained by using a master gauge. Metrology  
Preservation An item with the same identification is on the quality status list (QSL see definitions in the appendix) and has been preserved, shipped, and stored under conditions as specified by the materiel's managing ICP Shelf Life Control  
Printed Wiring Assembly The PWA consists of the PWB, components, and associated hardware and materials. Soldering  
Printed Wiring Board A pattern of conductors printed (screened) onto the surface of an insulating base to provide interconnection for parts. Soldering  
Process Necessary to provide clear direction to certain tasks; Guideline by which to conduct business Process Control  
Procurement The acquisition of goods or services Counterfeit Parts
Producibility Engineering This tasks analyzes production tooling, facilities, and manufacturing methods to ensure a low-cost, on-time, high quality delivery of a system System Engineering  
Projection microscope An x-ray microscope which magnifies by image projection, either in contact microradiography or in projection microradiography Non-Destructive Evaluation
Propagation The spreading of something into new regions Flammability
Propagation Paths The paths taken by a flame front external to (or within) an enclosure that represent fire paths between flammable materials. They are not necessarily straight or coplanar.  Flammability  
Puchasing Agent An agent who purchases goods or services for another Counterfeit Parts  
PWB material It is usually exhibited by a light area around holes, other machined areas, or both. Soldering  
Quality Assurance Activity of providing evidence to establish confidence that quality requirements will be met Quality Planning  
Quality Audit Independent review conducted to compare aspects of quality performance against a standard. Quality Planning  
Radial Lead Lead wire extending from a component or module body along its latitudinal axis. Soldering  
Radial Split A crack or other separation in the flange of an eyelet or other circular connector, which extends outward from the center. Such cracking is usually the result of swaging or other setting process as the item is embraced in a printed wiring board. Soldering  
Radiography The process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light Non-Destructive Evaluation  
Random Sampling An item or items of the same lot/batch number, contract number or NSN has been sampled and successfully passed inspection or test Shelf Life Control  
Rangeability A measurement term that indicates the range a specific flow meter, or meter type, is able to measure with acceptable accuracy. Metrology  
Reliability, Maintainability, and Availability (RMA) Engineering These tasks are performed tom maintain quality control and ensure mission success of a project. This type of engineering is often referred to as engineering the “ilities” System Engineering  
Repair Operations performed on a nonconforming article to place it in usable condition. Repair is distinguished from rework in that alternate processes rather than reprocessing are employed. Soldering  
Repeatability Repeatability is variation among repeated measurements performed by one operator to a single unit and with the same measurement instrument. Metrology  
Reproducibility Reproducibility is variation among the average measurements performed by several operators using the same units and the same measurement instrument. Metrology  
Requirement Analysis This task is the documenting of the initial set of requirements as defined from the needs analysis of a system. Requirements Analysis will continue to refine requirements as needed throughout the life-cycle (beginning to conclusion) of a project System Engineering  
Requirements Verification This task ensures there are methods, plans and schedules in place to ensure all defined requirements are properly verified and validated System Engineering  
Resistance Soldering Method of soldering by passing a current between two electrodes through the area to be soldered. Soldering  
Rework The reprocessing of articles or material that will make it conform to drawings, specifications, and contract. Soldering  
Risk Management This is the task of identifying, managing and mitigation system risks System Engineering  
Rivets Low-cost, permanently installed fasteners that are lighter and bolts Fasteners  
Rosin Solder Joint Unsatisfactory connection that has entrapped rosin flux. This entrapment is usually due to insufficient heat or insufficient time at soldering temperature, or both, not enabling the rosin to rise to the surface of the solder. This results in insufficient bonding and/or high electrical resistance. Soldering  
Run Chart A plot of individual data points versus time. Quality Planning  
Safety Engineering This task specializes in the critically of the safety of a system including operations of the system System Engineering  
Scatter Diagram A diagram to represent bivariate data and bring out the relationship between them. Quality Planning  
Shelf Life Total period of time beginning with date of manufacture, cure, assembly, pack, or after inspection or test that an item may remain in the combined wholesale/retail storage systems and remain suitable for issue to and/or consumption by the end user Shelf Life Control  
Shielding A third important way to reduce exposure is to place a shield between the operator and the source of radiation. The denser the shielding materials the more effective it is in bringing down the levels of exposure to X-rays and gamma rays. The commonly used shielding materials in radiographic installations and equipment are steel, lead, concrete and depleted uranium. Non-Destructive Evaluation  
Simple equipment For occasional testing of small castings or machine parts for detection of surface cracks small and easily potable equipment is the most convenient. Magnetic yokes are used for inspection of welds. Non-Destructive Evaluation  
Solder A nonferrous, fusible metallic alloy used to join metallic surfaces Soldering  
Solder A nonferrous, fusible metallic alloy used to join metallic surfaces. Soldering  
Solder Connection An electrical/mechanical connection that employs solder for the joining of two or more metal surfaces. Soldering  
Solder Mask Coating material used to mask or protect selected areas of a pattern from the action of an etchant, solder, or plating. Soldering  
Solder Pad Termination area on a printed wiring conductor. Soldering  
Solder Spatter Extraneous irregular-shape solder fragments. Soldering  
Solder Spike A cone shaped peak or sharp point of solder usually formed by the premature cooling and solidification of solder on removal of the heat source. Soldering  
Solderability The property of a surface that allows it to be wetted by a molten solder. Soldering  
Soldering The process of joining clean metallic surfaces through the use of solder without direct fusion of the base metals. Soldering  
Soldering Iron A hand tool used in soldering. It supplies heat to melt the solder so that it can flow into the joint between two workpieces. Soldering
Soldering Wire Solder that is stored as a thin, malleable string for use on small or delicate joints.  Soldering  
Stability Stability is the the change in bias over time. Metrology  
Staking Compound An electrically nonconductive adhesive material used for additional support after a component has been attached by mechanical or soldering process. Soldering  
Standard Uncertainty The positive square root of the estimated variance. Type A standard uncertainty is defined as the standard error of the mean of a series of measurements. Type B standard uncertainty is obtained for instance from a manufacturer’s handbook or from a calibration certificate (outside sources) or from an assumed distribution. Metrology  
Static electricity An electrical charge at rest Counterfeit Parts  
Stationary magnetizing equipment A large variety of stationary bench type units is available for different testing requirements. The smaller sized equipment is used for small parts that can be easily transported and handled by hand. The larger ones are used for heavy parts such as long diesel engine crankshafts where handling must be made by crane. Non-Destructive Evaluation  
Statistical Process Control Aplication of statistical methods to the measurements and analysis of variation in a process. Quality Planning  
Straight Pin Terminal A round post-type smooth terminal, with no grooves. Soldering  
Straight-Through Terminal A conductor termination extending through a PWB without subsequent forming of the lead. Soldering  
Stress Relief The formed portion of a conductor that provides sufficient length to minimize stress between terminations. Soldering  
Stud Termination An unbendable conductor termination extending through a PWB. Soldering  
Supplier In-house NASA, NASA contractors, and subtier contractors. Soldering  
Supportive Hole A hole in a printed board that has its inside surface plated or otherwise reinforced. Soldering  
Surface Mounting The electrical connection of components to the surface of a conductive pattern that does not utilize part holes. Soldering  
System Integration This is the task of ensuring that all the interrelated components of a system will work properly together System Engineering  
System Test and Evaluation This task involves defining and developing the system and sub-system test plans (including the master test plan), cross-walking the test plans with the requirements, executing the tests per the defined documentation, evaluating the test results and generating and delivering the test reports as described per the data management/handling plan System Engineering  
Technical System Design Reviews This is the task of planning, developing, scheduling, executing and providing follow-up of system design reviews, sometimes referred to as gates System Engineering  
Terminal A tie point device used for making electrical connection. Soldering  
Termination The point at which electrical conductors are joined. Soldering  
Termination Area A conductive surface on a PWB used for making electrical connections (also referred to as a solder pad). Soldering  
Test Accuracy Ratio (TAR) see rangeability Metrology  
Test Uncertainty Ratio (TUR) see rangeability Metrology  
Thermal Shunt A device with good heat dissipation characteristics used to conduct heat away from an article being soldered. Soldering  
Thermography A process for producing raised lettering, as on stationery or calling cards, by application of a powder that is fused by heat to the fresh ink Non-Destructive Evaluation
Time Limit personnel time. Time of handling a radiation source can be made low by proper training, adopting fast work technique, mock up practices and efficient administrative control. Non-Destructive Evaluation  
Tinning The coating of a surface with a uniform layer of solder. Soldering  
Torque A twisting force that tends to cause rotation Fasteners google
Trade-Off Analysis (Decision Modeling and Analysis) This task involves the studying, modeling, analysis and decision making of all alternatives to aid in selecting the best fit solution for the project at hand System Engineering  
Triboelectric charge An electrical charge generated by frictional movement, or separation of two surfaces Counterfeit Parts  
Tubelet A tubular metal part. Its ends may or may not be flared. Soldering  
Turn down ratio see rangeability Metrology  
Turret Terminal A round post-type grooved stud around which conductors are fastened before soldering. Soldering  
Uncertainty Uncertainty of measurement is defined as “a parameter associated with the result of a measurement that characterizes the dispersion of the values that could reasonably be attributed to the measure” (VIM 1993; GUM 1993). Metrology  
Unsupported Hole A hole containing no plating or other type of conductive reinforcement. Soldering  
Via A PTH used as an interlayer connection, but in which there is no intention to insert a component or other reinforcing material. Soldering  
Vision desired future state of the organization. Quality Planning  
Visual Inspection Inspection of equipment and structures using either or all of human senses such as vision, hearing, touch and smell Non-Destructive Evaluation
Void A space enclosed on all sides by the solder. Soldering  
Void Space Unoccupied volume in a container.  Flammability  
Washer A flat disk, as of metal, plastic, rubber, or leather, placed beneath a nut or at an axle bearing or a joint to relieve friction, prevent leakage, or distribute pressure Fasteners
Wave Soldering A process wherein PWAs are brought in contact with the surface of continuously flowing and circulating solder. Soldering  
Wetting Flow and adhesion of a liquid to a solid surface, characterized by smooth, even edges, and a low dihedral angle. Soldering  
Wicking A flow of molten solder, flux, or cleaning solution by capillary action. Soldering  
Workmanship A level of quality adequate to assure that processed products meet the performance requirements of the engineering documentation Soldering  
Workmanship The skill in an occupation or trade. The quality and accuracy of a pre-described or intended output that is constructed particularly by a human with or without the use of aides such as machinery. Workmanship