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| Data |
information
gathered usually to be stored in a database
or spreadsheet |
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| Database |
a program which
links together information so that it can be easily searched |
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| Data
Collection |
the collection of information that is useful in
understanding a design brief and developing design ideas. Questionnaires
are often used to collect data from potential users. |
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| Decoration |
the application of colour, texture and pattern to
a surface to improve its appearance |
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| Deciduous |
a broad leafed
tree that looses its leaves in winter |
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| Design
Brief |
a short statement about what is needed, who
it is for, and any constraints |
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| Design
Process |
the stages you
go through to complete a design proposal |
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| Designer |
a person who
devises solutions to design problems |
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| Design
Criteria |
a list describing the standards that a design
must meet if it is to be successful |
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| Design
Proposal |
a response to a design brief, a description of
the product to be made in sufficient detail that the designer and/or the
client can decide whether it is worth developing the proposal further |
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| D.C. |
abbreviation for direct
current |
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| Difference
test |
a test to find out if people can tell the
difference between slightly different food products |
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| Digital
signal |
a signal which
has only two states: on and off |
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| Dimension |
measurement
shown on a drawing |
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| Diode |
A diode will allow
electrical current to flow in one direction only. They are solid
state devices and typically need more than 0.6 volts
to operate. In a normal diode, current flows from the positive anode
to the negative cathode. There are several special types
including LEDs, (light emitting diodes) photodiodes
and zener diodes. |
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| Direct
Current |
electric current
which is always either +ve or -ve |
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| Disassemble |
to look closely at a product or to take it apart
carefully, to identify how it works, what is is made from, how it was
manufactured etc. |
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| DMA |
design and make
assignment |
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| DMT |
design and make
task |
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| Double
Acting Cylinder |
a pneumatic
component where air pushes a piston forwards and backwards |
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| DPDT |
double pole
double throw (on a switch or relay) |
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| DPST |
double pole
single throw (on a switch or relay) |
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| Draft
angle |
an angled
surface all around a pattern to help release it from a vacuum form
or sand casting mould |
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| Drill |
a tool used for making small round holes in wood,
plastic and metal |
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| Drill
Bit |
the cutting tool used in a drill. It is held in
the chuck and cuts into the material as it rotates |
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| Drill
Stand |
a device for holding a drill so that it is easy
to use and it drills perpendicularly |
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| Drive
belt |
rubber plastic
or leather bands used to transmit motion between pulley wheels |
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| Ductile |
the
property of a material to be drawn into a longer thinner cross-section
without breaking. |
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| Dye |
a chemical
colouring agent |
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Dynamic |
a moving load |
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