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PLTW- Semester 1
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Terms in this set (46)
brainstorm
a group technique for solving problems, generating ideas, & stimulating creative thinking
constraint
a limit to a design process: may be such things as appearance, funding, space, materials, and human capabilities
design
an iterative decision-making process that produces plans by which resources are converted into products or systems that meet human needs and wants or solve problems
design brief
a written plan that identifies a problem to be solved, its criteria, and its constraints
design statement
a part of a design brief that challenges the designer, describes what a design solution should do without describing her to solve the problem, and identifies the degree to which the solution must be executed
engineering notebook
a book in which an engineer will formally document, in chronological order, all his/ her work that is associated with a specific design project
prototype
a full-scale working model used to test a design concept by making actual observations and necessary adjustments
research
the systematic study of materials and sources in order to establish facts and reach new conclusions
design process
-Define problem
-Generate concepts
-Develop a solution
-Construct and test prototype
-Evaluate solution
-Present solution
center line
a line which defines the center of arcs, circles, or symmetrical parts
extension line
line which represents where a dimension starts and stops
dimension line
a line which represents distance
object line
a heavy solid line used on a drawing to represent the outline of an object
construction line
line lightly drawn to guide drawing other lines and shapes
hidden line
a line type that represents an edge that is not directly visible
orthographic projection
a method representing 3D objects on a plane having only length and breadth (Right Angle Projection)
leader line
line which indicates dimensions of arcs, circles, and detail
cabinet pictorial
oblique pictorial where depth is represented as half scale compared to the height and width scale
cavalier pictorial
oblique pictorial where height, width, and depth are represented at full scale
pictorial sketch
a sketch that shows an object's height, width, and depth in a single view
isometric sketch
a form of pictorial sketch in which all three drawing axes form equal angles of 120 degrees with the plane of projection
perspective sketch
a form of pictorial sketch in which vanishing points are used to provide the depth and distortion that is seen with the human eye
multi-view drawing
a drawing which contains views of an object projected onto two or more orthographic planes
oblique sketch
a form of pictorial in which an object is represented as true width and height, but the depth can be any size and drawn at any angle
3 spatial dimensions
height, width, depth
technical working drawing
a drawing that is used to show material, size, and shape of a product for manufacturing purposes
accuracy
the degree of closeness of measurements to the actual or accepted value
histogram
a graph of vertical bars representing the frequency distribution of a set of data
statistic
collection of methods for planning experiments, obtaining data, organizing, summarizing, and presenting, analyzing, interpreting, and drawing conclusions based on data
standard deviation?
a measure of the spread of data values
normal distribution
a function that represents the distribution of variables as a symmetrical bell-shaped graph
mode
the value that occurs most frequently
range
the difference between the ,arrest and smallest values that occur in a set of data
median
a measure of center in a set of numerical data
significant digits
the digits in a decimal number that carry meaning contributing to the precision or accuracy of the quantity
central tendency
"center" of a distribution ex. mean, median, mode
caliper
a messing instrument having two adjustable jaws typically used to measure distance or thickness
model
a visual, mathematical, or 3D representation in detail of an object or design, often smaller than the original
annotate
to add explanatory notes to a drawing
component
a part or element of a larger whole
physical model
a physical representation of an object. Prototypes and appearance models are physical models.
scale model
an enlarged or reduced representation of an object that is usually intended for study purposes
geometric constraint
constant, non-numerical relationships between the parts of a geometric figure ex. parallelism, perpendicularity, and concentricity
solid modeling
a type of 3D CAD modeling that represents the volume of an object, not just its lines and surfaces
mathematical modeling
the process of choosing and using appropriate mathematics and statistics to analyze empirical situations, to understand them better, and to improve decisions
working drawings
drawings that convey all of the information needed to manufacture and assemble a design
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