Specifications

Glossary 139
Test Limits
The acceptable boundaries for a test. If the results from a test are less than the lower limit or greater than
the upper limit, the test fails. A test can have more than one set of limits, where each set is associated
with a named variant, such as “Hot” or “Cold.”
Test Executive
A software tool used to develop tests, assemble them into a testplan, and run the testplan.
Test
A sequence of actions executed as a group to do some form of test. As a minimum, each test must contain
an execute action. It also can contain one or more optional setup or cleanup actions.
To be meaningful, most tests have a limits checking feature that determines if the Unit Under Test passed
or failed the test. Also, most tests use a data logging feature to store information collected during the test.
Testplan
A named sequence of tests that is executed as a group to test a specific device or Unit Under Test. A test
plan also can be further divided into groups of tests called “test groups.”
Topology
A combination of physical and logical descriptions that define the switching configuration and
interconnections between resources and the DUT, which includes definitions for the modules, wires,
switches, and buses of the test system. These definitions map a logical view of your system's hardware
onto its physical reality, and add a level of abstraction.
Topology Layer
Topology is defined in three layers: system, fixture, and DUT. The first layer defines the system
hardware, the second defines one or more fixtures used with the system hardware, and the third defines
one or more DUTs used with a given fixture.
Information defined at the system layer includes:
• Definitions for any cards or modules used in the system.
• A definition of the cabling that connects the cards or modules.
• Definitions of convenient names--i.e., aliases--for system resources, such as “DvmHi.”
Information defined at the fixture layer includes:
• Definitions of wires in the fixture.
• Definitions for the names of any edge connectors.
• Definitions for any electronics inside the fixture that is a part of your switching strategy.
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