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Design
Parameters
Qualitative, quantitative, physical, and functional value characteristics that are
inputs to the design process, for use in design tradeoffs, risk analyses, and
development of a system that is responsive to system requirements.
Design Phase A period of time in the software life cycle during which the designs for
architecture, software components, interfaces, and data are created,
documented, and verified to satisfy requirements.
Design-to-Cost
(DTC) Goal
Management concept wherein rigorous cost goals are established during
development, and the control of systems costs (acquisition, operating, and
support) to these goals is achieved by practical tradeoffs between operational
capability, performance, costs, and schedule. Cost, as a key design parameter,
is addressed on a continuing basis and as an inherent part of the development
and production process. A DTC goal should be in the form of average unit
flyaway cost. Also, DTC parameters for operation and support will be
selected—parameters that are design-controllable, significantly affect O&S costs,
and can be measured during test and evaluation. Parameters may be
expressed in dollars or by other measurable factors, e.g., manpower, reliability, or
maintainability. Firm goals and thresholds will be established no later than entry
into EMD (Milestone II). This is an in-house goal, almost contractual in nature,
between the PM (Service) and the SECDEF. Allocations from this goal will
become the contractual DTC goals for contractors supporting the program.
Det Detachment.
DETEC Defense Technology Evaluation Code.
Detector A passive IR, visible, UV detector turns photons into an electrical signal. The
IFOV of the detector is its solid angular sub-tense. There is sometimes
confusion between the detector sub-tense (size) and the pixel (picture element
size). They are the same for a staring sensor, but in a scanner it depends on
the array offset and number of samples per dwell. A pixel area is often only onesixth
or one-eighth of a detector angular area.
MDA GLOSSARY, VER. 4.0 D
79
DEV ENV Development Environment.
Development
Test (DT)
Test conducted by the development test organization to achieve specified test
objectives. It may be a complete test, a subtest, or a phase of a test.
Development
Test I (DT I)
A series of tests conducted during the demonstration and validation phase.
Components, subsystems, or the total (or full) system are examined to determine
whether the system is ready for EMD. State-of-the-art technology is addressed
in DT I.
Development
Test II (DT II)
A series of tests, normally during EMD, which provide the technical data
necessary to assess whether the system is ready for low-rate initial or full
production. It measures the technical performance and safety characteristics of
the item and evaluates its associated tools, test equipment, training package,
and maintenance test package as described in the development plan. DT II
addresses accomplishment of engineering design goals and the fulfillment of
contract specifications.
Development
Test III (DT III)
Tests conducted during production.
Development
Test and
Evaluation
(DT&E)
Test and evaluation conducted to measure progress, usually of
component/subsystems, and the proofing of manufacturing processes and
controls and to assist the engineering design and development process and
verify attainment of technical performance specifications and objectives. Usually
conducted under controlled or laboratory conditions. Can be conducted before
or after production begins.
Development
Test (DT)
Test conducted by the development test organization to achieve specified test
objectives. It may be a complete test, a subtest, or a phase of a test.
Deviation Criteria Limits established beyond which a Program Manager may not trade-off cost,
schedule, or performance without authorization from the milestone decision
authority. Acquisition Program Baseline (APB) thresholds represent these
parameters.
Devolution of
Command
Minimal essential operational capability to perform C2 provided in an orderly and
timely fashion to a duly authorized successor.
DEW (1) Directed Energy Weapon. (2) Directed Energy Warfare.
DEW/D Directed Energy Weapon/Discrimination.
DEWG, O Directed Energy Weapon Ground, Orbital
DEWL Directed Energy Weapon, Laser (thermal or impulse).
DEWP Directed Energy Weapon, Particle Beam (neutral or charged).
DF-KBS Data Fusion Knowledge Based System.
DF2 Deuterium Fluoride.
DFAR Defense Federal Acquisition Regulation
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