50 terms

# DT Core (L6 IB)

The definitions you need to know for first year of IB.
###### PLAY
the solution is found in a similar situation in another field
Algorithm
a sequence of instructions to describe a set of actions
Analogy
the transfer of an idea from one context to another
Brainstorming
a form of group thinking to come up with ideas where no criticism is allowed
Design brief
the formal starting point for the design of the product
Computer modeling
a computer program which attempts to simulate the abstract model of a particular system
Computer Aided Design
the use of computers to aid the design process
Constructive discontent
analysing a situation, which would benefit from re-design, and working out a strategy for improving it.
Convergent thinking
the ability to analise the information and choose an answer from the wide range of alternatives
Design specification
justifies the precise requirements of the design and also list of criteria against which it can be evaluated
Divergent thinking
the ability to come up with wide range of possible solutions
Exploded isometric drawing
an isometric drawing of an object with more than one component which shows how they fit together
Flow chart
a schematic representation of the process
Free hand drawing
the spontaneous representation if the ideas on paper without any technical aids
Incremental design
small changes to the design of a product, which are insignificant on their own, but accumulate over time to give a larger effect
Isometric drawing
a 3D epresentation of an object drawn with a 30 degree inclination to the vertical plane
Mathematical model
a model that using mathematic symbols that can be manipulated numerically
Morphological synthesis
an elaboration of attribute listing, listed along two sides of 2D grid
Orthographic drawing
a series of flat veis showing the object in its exact shape and size
Perspective drawing
a 3D drawing that realistically represents an object by utilizing foreshortening and vanishing points
where a completely new product is devised by going back to the roots of the problem and thinking about a solution in different way
Design for assembly
designing taking into account of assembly at different levels e.g. component to component and subassemblies
Design for disassembly
designing whilst taking into account the need to take apart the product when it becomes obselete so that it can be reused, repaired or materials recycled
Design for manufacture
designing specifically for the optimization of current manufacturing capability
Design for materials
design in relation to materials during processing
Design for process
designing the product so it can be made using a specific process such as injection moulding
Green design
designing a product in a way that takes account its impact on the environment throughout its life
Life analysis
the assessment of the effect that a product has from its initial concept to disposal
Alloy
a mixture that contains at least one metal
Atom
the smallest part of an element that can exist chemically
Composite
a mixture composed of two or more substances when one acting as the matrix or glue
Density
the mass per unit volume of material
Ductility
the ability of the material to be drawn into wires or other extended shape
Electrical resistivity
a measure of a material to conduct electricity
Fibre
a class of materials that are continuous filaments or discreet elongated pieces with the thickness to length ratio of at least 1:80
Fibre structure
a filamentous material long in relation to its width
Hardness
the resistants materials offers against scratching or penetration
Molecule
two or more atoms bonded together covalently
Plastic deformation
the permanent deformation of an object subjected to stress
Tensile strength
the ability of the material to resist pulling forces
Thermal conductivity
the ability of a material to pass on heat energy
Thermal expansion
the change in a volume of a material due to a change in its temperature
Toughness
the ability of an object to withstand the propagation of cracks
Fixed costs
costs of production which do not change regardless of how much you produce
Mass production
the production of large amounts of a standardized product on production lines giving a high rate of production per worker
Field trial
a test of the performance of some new product under the conditions in which it will be used
Performance test
an evaluation of the actual performance of the task or learning objective using the condition under which it will be performed and act as an absolute standard for acceptable performance
User trial
the observation of people using the product and collection of their comments
Value for money
the relation between how much something is priced and what it is worth
Injection moulding
the direct introduction of molten plastic under pressure into a die where it cools and solidifies upon contact with the surface of the die