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SCADA

Supervisory Control and Data Acquisition

SECURITY TESTING

Testing whether the system meets its specified security
objectives.(BCS)

SERVICEABILITY TESTING

See maintainability testing.

SIMPLE SUBPATH

A subpath of the control flow graph in which no program
part is executed more than necessary.(BCS)

SIMULATION

The representation of selected behavioural
characteristics of one physical or abstract system by
another system. [ISO 2382/1].

SIMULATOR

A device, computer program or system used during
software verification, which behaves or operates like a
given system when provided with a set of controlled
inputs. [IEEE,do178b]

SLIDING WINDOW.

A technique to determine the century (high-order
digits) of a year when represented by two digits.  The
user specifies the number of years (both past and
future) within a 100-year window spanning two
centuries.  For example, assume the window is set at 19
future years (1996-2014) and 80 past years (1915-1994).
Dates in the range "00-14" (inclusive) are designated
21st century dates because they fall into the future
window.  Dates in the range "15-99" (inclusive) fall
into the 20th century. (IBM)

SOFTWARE TESTING

is the process of executing software in a controlled
manner, in order to answer the question "Does the
software behave as specified?" [Gerrard]

SOLUTION DEVELOPERS.

Also known as THIRD-PARTY VENDORS and INDEPENDENT
SOFTWARE VENDORS.  Marketers of computer hardware
and/or software products, tools, or services to
complement IBM's suite of products and services. (IBM)

SOURCE STATEMENT

See statement.

SPECIAL DATES

Also known as SPECIAL VALUES

There are two forms of special dates: reserved dates
and test dates.

Some or all of the dates listed may not be appropriate
for the testing of a specific system element because,
for example, the system element may not be date
sensitive, or does not represent dates as calendar
dates (e.g. using ordinal dates or system clock values
instead), or because the dates are outside the system
element's valid date range.
(IEEE)

For samples of special dates:
 http://www.cinderella.co.za/criteria.txt
 http://www.cinderella.co.za/timeline.htm

SPECIAL VALUES

see SPECIAL DATES

Programmers or Users sometimes use special values in a
date field to denote special cases.  For example "All
9's" might mean "Flag for Deletion" or "Date unknown".
These values might be invalid as dates but could be
hardcoded in programs prior to date validation.
Alternately, valid dates usually "future" dates, might
be used for special purposes.  Such Special Values
might be formally documented, but where informally used
as Ad Hoc temporary solutions would probably be
undocumented.


SPECIFICATION

A description of a component's function in terms of its
output values for specified input values under
specified preconditions.(BCS)

SPECIFIED INPUT

An input for which the specification predicts an
outcome.(BCS)

STANDARDS

ISO 8601:1988, Data elements and interchange formats -- Information
interchange -- Representation of dates and times

ANSI X3.30: 1985, Representation for Calendar and Ordinal Date for
Information Interchange

FIPS PUB 4-1, Representation for Calendar Date and Ordinal Date for
Information Interchange, Change Number 1, March 25, 1996

DISC PD2000-1, A Definition of Year 2000 Conformity Requirements (a
British Standards Institute publication)

General Services Administration Federal Acquisition Rule (FAR)
39.002, (Federal Register 66 FR44830), August 22, 1997

General Services Administration White Paper entitled "Year 2000",
August 1997
(IEEE)

STANDARD TIME

Source: Defense Mapping Agency Hydrographic/Topographic
Center; U.S.  Dept. of Transportation Standard Time is
reckoned from Greenwich, England, recognized as the
Prime Meridian of Longitude.  The world is divided into
24 zones, each 15 degreees of arc, or one hour in time
apart. (see TIME ZONES) (FW)

STATE TRANSITION

A transition between two allowable states of a system
or component.(BCS)

STATE TRANSITION TESTING

A test case design technique in which test cases are
designed to execute state transitions.(BCS)

STATEMENT

An entity in a programming language which is typically
the smallest indivisible unit of execution.(BCS)

STATEMENT COVERAGE

The percentage of executable statements in a component
that have been exercised by a test case suite.(BCS)

STATEMENT TESTING

A test case design technique for a component in which
test cases are designed to execute statements.(BCS)

STATIC ANALYSIS

Analysis of a program carried out without executing the
program.(BCS)

investigates the source code of software, looking for
problems and gathering metrics without actually
executing the code.[Gerrard]

STATIC ANALYZER

A tool that carries out static analysis.

STATIC TESTING

Testing of an object without execution on a
computer.(BCS)

STATISTICAL TESTING

A test case design technique in which a model is used
of the statistical distribution of the input to
construct representative test cases.(BCS)

STORAGE TESTING

Testing whether the system meets its specified storage
objectives.(BCS)

STRESS TESTING

Testing conducted to evaluate a system or component at
or beyond the limits of its specified requirements.
[IEEE]

STRUCTURAL COVERAGE

Coverage measures based on the internal structure of
the component.(BCS)

STRUCTURAL TEST CASE DESIGN

Test case selection that is based on an analysis of the
internal structure of the component.(BCS)

STRUCTURAL TESTING

See structural test case design.

STRUCTURED BASIS TESTING

A test case design technique in which test cases are
derived from the code logic to achieve 100% branch
coverage.(BCS)

STRUCTURED WALKTHROUGH

See walkthrough .

STUB

A skeletal or special-purpose implementation of a
software module, used to develop or test a component
that calls or is otherwise dependent on it.  After
[IEEE].

SUBPATH

A sequence of executable statements within a
component.(BCS)


SUBSTITUTION

replacing non-compliant applications with compliant
ones.  This method is not universally appropriate, but
is effective if it can be applied.
(CJ)

SYMBOLIC EVALUATION

See symbolic execution.

SYMBOLIC EXECUTION

A static analysis technique that derives a symbolic
expression for program paths.(BCS)

SYNTAX TESTING

A test case design technique for a component or system
in which test case design is based upon the syntax of
the input.(BCS)

SYSTEM

A cohesive collection of people, machines and methods
organised as a single unit to accomplish a set of
functions.

SYSTEM DATE

also known as DOS DATE

A Date and Time clock, resident in main memory, used by
most applications, varies by OS, set up at boot time by
reading RTC via BIOS.  Accurate to approximately one
hundredth of a second.  Accessed by Operating system
Int 21 calls.  Volatile.  Normal Operating system
calls for Date and Time display this date.

SYSTEM TESTING

The process of testing an integrated hardware and
software system to verify that the system meets its
specified requirements.  (IEEE 729-1983)

The process of testing an integrated system to verify
that it meets specified requirements. [Hetzel]