S&T
SCIENCE AND TECHNOLOGY

S/S
SOLIDIFICATION/STABILIZATION

SAB
SCIENCE ADVISORY BOARD OF THE EPA

SACRIFICIAL COATING
The deposit acts as an anode with respect to the basis metal when oxidation occurs. It protects the base metal.
Zinc plated on steel is an example.

SAE
SOCIETY OF AUTOMOTIVE ENGINEERS

SAL AMMONIA
The common name for ammonium chloride.

SAM
SCANNING AUGER MICROSCOPE

SAMPE
SOCIETY FOR THE ADVANCEMENT OF MATERIAL AND  PROCESS ENGINEERS

SAMPLE
A group of items taken from a larger population at random that serves to provide information about the entire population.

SAMPLE PLAN
A statement about sample size and criteria for acceptance or rejection.

SAP
SAMPLING AND ANALYSIS PLAN

SARA
SUPERFUND AMENDMENTS AND REAUTHORIZATION ACT

SATURATION
That point  in adding chemicals (solids) to a solution  at which a chemical will be absorbed
by the solution  causing  it to 'drop-out'.

SBA
SMALL BUSINESS ADMINISTRATION

SBDC
SMALL BUSINESS DEVELOPMENT CENTER

SBIR
SMALL BUSINESS INNOVATION RESEARCH PROGRAM

SCADA
SUPERVISORY CONTROLS AND DATA ACQUISITION

SCATTER DIAGRAM
A scatter diagram is a visual tool for showing the relationship between two variables.
It shows clearly if there is a   relationship, or correlation, between the two variables:
POSITIVE CORRELATION -  as x increases, so does y;  NEGATIVE CORRELATION -
as x increases, y decreases;  NO CORRELATION - one quantity has no particular
relation to the other.  It provides the verification of a potential root cause.

SCBA
SELF-CONTAINED BREATHING APPARATUS

SCC
STRESS-CORROSION CRACKING

SCDI
SERIOUS CHEMICAL DISTRIBUTION INCIDENT

SCFM
STANDARD CUBIC FEET PER MINUTE

SCR
SILICON-CONTROLLED RECTIFIER

SDWA
SAFE DRINKING WATER ACT

SE
SYSTEMS ENGINEERING

SEC
SECURITIES AND EXCHANGE COMMISSION

SECAL
SEPARATE ENGINEERING CONTROL AIR LIMITS

SEDESOL
MINISTRY OF SOCIAL DEVELOPMENT

SEDUE
MEXICAN ENVIRONMENTAL AGENCY

SEM
SCANNING ELECTRON MICROSCOPY

SERC
STATE EMERGENCY RESPONSE COMMISSION

SERDP
STRATEGIC ENVIRONMENTAL RESEARCH AND  DEVELOPMENT PROGRAM

SEVEN BASIC TOOLS of QC
The major use of QC tools is to provide objectivity and clarity.  The tools separate
opinions from data-based logic, thereby  allowing anyone to 'speak with facts.'
The SEVEN TOOLS of QC are :  CHECKSHEET, PARETO CHART, ISHIKAWA  or
FISHBONE DIAGRAM, GRAPH, HISTOGRAM, SCATTER DIAGRAM, and CONTROL CHARTS.

SFF
SOLID FREEFORM FABRICATION

SFMRB
SURFACE FINISHING MARKET RESEARCH BOARD

SFSJ
SURFACE FINISHING SOCIETY OF JAPAN

SHERARDIZING
A method of coating steel with a thin adherent film of zinc, by sintering zinc powder.

SHI
SUBSTANCE HAZARD INDEX

SHINE ROLLING
A form of burnishing which uses no abrasive or chemicals. Usually burrs are peened against each other to improve luster.

SIC
STANDARD INDUSTRIAL CLASSIFICATION

SIDS
SCREENING INFORMATION DATA SET

SIMS
SECONDARY ION MASS SPECTROSCOPY

SIP
STATE IMPLEMENTATION PLAN

SIPI
SCIENTISTS' INSTITUTE FOR PUBLIC INFORMATION

SITE
SUPERFUND INNOVATIVE TECHNOLOGY EVALUATION

SIU
SIGNIFICANT INDUSTRIAL USES

SIX-SIGMA
A statistical way of measuring quality, six-sigma is equivalent to 3.4
defects per million units of output-a virtually  defect-free level of performance.
The ambitious, company wide goal of 'SIX-SIGMA QUALITY' has been adopted
by Motorola, a 1988 Baldridge Award winner.

SLAKE LIME
The common name for calcium hydroxide.

SLS
SELECTIVE LASER SINTERING

SMC
SHEET MOLDING COMPOUND; SURFACE MOUNT  COMPONENTS

SME
SOCIETY OF MANUFACTURING ENGINEERS

SMOBC
SOLDER MASK OVER BARE COPPER

SMT
SURFACE MOUNT TECHNOLOGY

SNAP
SIGNIFICANT NEW ALTERNATIVES POLICY

SNC
SIGNIFICANT NONCOMPLIANCE

SOC
SYNTHETIC ORGANIC CHEMICALS

SOCMA
SYNTHETIC ORGANIC CHEMICAL MANUFACTURERS'  ASSOCIATION

SODA ASH
The common name for sodium carbonate.

SOLID FILM COATING
A process in which the parts (bearings) are coated with a resin-bonded lubricant like molybdenum disulfide, graphite or polytetra-fluoroethylene.

SOIL
Any foreign material on the surface of base metal  such as grease  oil oxide
dust  fingerprints  smut  paint  flux   or other unwanted film.

SOP
STANDARD OPERATING PROCEDURE

SPC
STATISICAL PROCESS CONTROL
Based on the principle that no two units of output of a process are likely to
have the exact same specifications  SPC involves the mathematical determination
of acceptable limits of variation.  Graphs are used by workers to plot
output variables and visually determine when a process is 'IN' or 'out of' control.

SPCC
SPILL PREVENTION CONTROL AND COUNTERMEASURE  PLAN

SPECIFICATION LIMITS
The conformance boundary for the individual characteristics for a manufactured item.

SPE
SOCIETY OF PLASTIC ENGINEERS

SPECIAL CAUSE
An 'abnormal' source of variation that does not arise from the production process
itself  but which is extraneous and  unpredictable.

SPECIFICATION LIMITS
Specification limits are determined by the customers' valid requirements  regardless
of what the process is capable of achieving.

SPF
SUPERPLASTIC FORMING

SPM
SCANNING PROBE MICROSCOPE

SQC
STATISCAL QUALITY CONTROL
A relatively early development in the evolution of the quality discipline, SQC
relies on statistical concepts and tools  ( e.g., sampling techniques ) to control
production quality.  SQC techniques are used in TOTAL QUALITY  MANAGEMENT,
although the emphasis in TQM is on 'building quality in,' rather than error detection.
 

SQG
SMALL-QUANTITY GENERATOR

SQUARE MILE
144 SQ. INCHES = 1 SQ. FT    9 SQ. FT = 1 SQ. YARD
30 1/4 SQ. YARDS = 1 SQ. ROD    40 SQ. RODS = 1 ROOD
4 ROODS = 1 ACRE    640 ACRES = 1 SQ. MILE

SRF
STATE REVOLVING FUNDS

SRRP
SOURCE REDUCTION REVIEW PROGRAM

SSIUS
SPECIALTY STEEL INDUSTRY OF THE UNITED STATES

SSM
SEMISOLID MATERIALS

SSO
SANITARY SEWER OVERFLOW

STANDARD DEVIATION
The STANDARD DEVIATION is a measure of how tightly the data points cluster
about the mean ( average ). It is represented  by Sigma ( o-).  The Standard
Deviation is far less sensitive to the addition of another data point or the changing
of a data  point;  therefore, it is a more reliable MEASURE OF THE VARIABILITY of a process.

STARDUSTING
A fine salt-and-pepper like nickel deposit, caused by codeposition of metallic contaminant such as iron, aluminum or calcium.

STEC
SURFACE TREATMENT ENHANCEMENT COUNCIL

STEEL
An alloy of iron and carbon with traces of other metals to enhance either physical and chemical properties.

STEL
SHORT-TERM EXPOSURE LIMIT

STEP
STANDARD FOR THE EXCHANGE OF PRODUCT DATA

STI
STEEL TUBE INSTITUTE

STM
SCANNING TUNNELING MICROSCOPE

STRATIFICATION
Stratification is a technique used for breaking down the whole ( total area of concern )
into smaller, related subgroups.  Stratification of information specifies the data and enables
someone to do a more precise analysis of it.  It is a useful tool  for verifying root cause.

STRETCH GOAL
An ambitious  usually long-term quality goal that requires extraordinary effort
innovation  and planning to achieve.

STRIKE
Thin layer of nickel or copper over a clean  active  raw base metal plated from a
corrosive low-metal content bath;  used on stainless steel.

STRIPPING VOLTAMMETRY
An analytical process which measures the applied voltage versus anodic stripping. It consists of stripping the species
electrochemically until there is a change in voltage.

SUBSTRATE
Any exposed surface of the raw parts to be plated;  ( also called 'base'  'base metal'  or 'raw part' ).

STUDENT’S T-TEST
A test of a hypothesis using small sample inferences for a population.

SVC
SOCIETY OF VACUUM COATERS

SVE
SOIL VAPOR EXTRACTION

SWMU
SOLID WASTE MANAGEMENT UNITS

SWPPP
STORM WATER POLLUTION PREVENTION PLAN