Various automated reports are produced period-
ically for the ship, the repair activities, the unit com-
manders, and the type commanders. These automated
reports include a ship’s current maintenance project
file, work requests, and preinspection and survey
deficiency listings.
MAINTENANCE TESTING
Integrated maintenance tests must be scheduled
to reduce redundancy wherever possible. Combat
systems testing is conducted at three levels: (1)
systems, (2) subsystems, and (3) equipments. These
three testing levels are described in the following
subsections.
SYSTEMS TESTING
Systems testing exercises the entire combat sys-
tems. It is the highest level of testing that can be
done aboard ship. Combat systems tests are usually
automated and monitored in the CDS subsystems.
Although these tests provide an overview of sys-
tems performance, they usually do not test the fill
capabilities of the overall combat system itself. It is
impractical, from an instrumentation and manpower
standpoint, to test all the fictional requirements at
the systems level. Therefore, confidence in opera-
bility or materiel readiness is mainly dependent on
integrated testing at the subsystem or equipment
level.
Systems-level tests provide a verification of the
alignment between sensors; the on-line, real-time
monitoring of combats system interfaces; and the
overall test of the 3-D search radar and its interface
with the CDS. These tests are described in the
CSTOM.
SUBSYSTEMS TESTING
Subsystems testing exercises two or more pieces
of equipment fictionally contained within the same
subsystem. The intent of subsystems testing is to test
intrasubsystem (within the subsystem). However,
with the need for integrated testing, some functions
are tested intersubsystem (outside the subsystem).
The subsystems operability/readiness test is the
keystone of integrated subsystems testing. This test
consists of a rigidly controlled sequence of steps
designed to test all critical functions during a primary
mode of operation. The subsystems operability/readi-
ness test and a supporting family of tests use the
concept of end-point testing, in which functions are
stimulated at their terminal point, thereby verifiing
all operations within the function. Subsystems tests
are functionally grouped and mode oriented so that
related functions can be tested by using the same set-
up, procedures, and stimuli.
EQUIPMENTS TESTING
Equipments testing generally concerns power
levels, frequencies, servos, special features, and out-
put functions. The equipment PMS may require
special external stimulating equipment for test mea-
surements. These test measurements are often time-
consuming and difficult to complete, but are always
checked by the SERT to ensure optimum readiness.
FAULT ISOLATION
The goal of fault isolation is to determine system-
atically the part or condition responsible for a fault or
degraded operation during testing or tactical opera-
tion. The process often involves impact evaluation.
Impact evaluation requires considering whether (1)
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