IED Semester Exam Review Ms. Johnson
Terms in this set (64)
design process step: validate, justify, design requirements, project proposal
A method for determining what features a product should have, and what metrics can be used to measure the quality or performance of the product, based on analysis of customer needs and preferences. The concept engineering process generally includes framing the project, collecting data, analyzing the data, and selecting actions.
think of a solution for the problem you approach.
test your solution to see if it works or not
look at your solution overall and evaluate it
show other people your solution
1. 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. 2. A plan or drawing produced to show the look and function or workings of something before it is built or made. 3. A decorative pattern.
A group technique for solving problems, generating ideas, stimulating creative thinking, etc. by unrestrained spontaneous participation in discussion.
a three-dimensional representation of a person or thing or of a proposed structure, typically on a smaller scale than the original.
A full-scale working model used to test a design concept by making actual observations and necessary adjustments.
A written plan that identifies a problem to be solved, its criteria, and its constraints. The design brief is used to encourage thinking of all aspects of a problem before attempting a solution.
A book in which an engineer will formally document, in chronological order, all of his/her work that is associated with a specific design project.
a large, thin, flat case for loose sheets of paper such as drawings or maps.
A technical report is a document that describes the process, progress, or results of technical or scientific research or the state of a technical or scientific research problem. It might also include recommendations and conclusions of the research.
a thing able to be provided, especially as a product of a development process.
1. A limit to a design process. Constraints may be such things as appearance, funding, space, materials, and human capabilities. 2. A limitation or restriction.
A decision matrix is a list of values in rows and columns that allows an analyst to systematically identify, analyze, and rate the performance of relationships between sets of values and information. Elements of a decision matrix show decisions based on certain decision criteria.
the art of drawing solid objects on a two-dimensional surface so as to give the right impression of their height, width, depth, and position in relation to each other when viewed from a particular point.
An exploded view drawing is a diagram, picture, schematic or technical drawing of an object, that shows the relationship or order of assembly of various parts. It shows the components of an object slightly separated by distance, or suspended in surrounding space in the case of a three-dimensional exploded diagram.
the act of manufacturing
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.
A form of pictorial sketch in which all three drawing axes form equal angles of 120 degrees with the plane of projection.
# of Needed Views
A drawing which contains views of an object projected onto two or more orthographic planes.
A method of representing three-dimensional objects on a plane having only length and breadth. Also referred to as Right Angle Projection.
Best Front View
the view that shows all sides of object.
Annotated Sketch: a detailed sketch that is label with critical dimensions, notes, and symbols.
a drawing including all measurements and constraints.
SI and English Units
The digits in a decimal number that carry meaning contributing to the precision or accuracy of the quantity.
to guess the measurement
to change slightly
to change a lot
Dimension the feature in a view where its characteristic shape is shown. English parts are dimensioned in inches with decimals, not fractions. Metric parts are dimensioned in mm w/ decimals. Units are omitted from the dimension numbers since they are normally understood to be in millimeters or inches. Always leave at least 3/8 in. (10 mm) between the object and the first row of dimensions. Successive rows of dimensions should be equal and at least 0.25 in. (6 mm) apart.
Size and Location
things that describe the object
A measure of center in a set of numerical data, computed by adding the values in a list and then dividing by the number of values in the list.A measure of center in a set of numerical data. The median of a list of values is the value appearing at the center of a sorted version of the list - or the mean of the two central values if the list contains an even number of values.The value that occurs most frequently in a given data set
The distance of a value in a population (or sample) from the mean value of the population (or sample).
+ or - sigma with normal Distributions
In mathematics, the upper case sigma is used for the summation notation. The lower case sigma stands for standard deviation.
Precision and Accuracy
The degree to which repeated measurements show the same result.
a real or imaginary line through the center of something, especially one following an axis of symmetry.
A line used to define a part feature that is not visible in a specific view. Hidden lines consist of a series of short dashes.
a drawing or sketch restricted to line without shading or modeling of form.
A leader line is a line that establishes a connection between a graphical representation of an item and some text.
Thin lines that serve as guides while sketching or drawing.
Thin lines used to establish the extent of a dimension. Extension lines begin with a short space from the object and extend to about .125 inches past the last dimension line. Extension lines may cross object lines, center lines, hidden lines, and other extension lines, but may not cross dimension lines.
A line which represents distance.
hole and thread line
Use Hole and Thread to add a hole or thread note with a leader line. The default format and content of the note are determined by the settings on the Notes and Leaders tab in the associated dimension style of the hole note.
Arrowheads are used to indicate the end of a dimension line or leader.
center mark line
A line that marks the center of an object, often time invisible
the thing on the side that allows you to do things to your project.
the thing under the tab of sketch, create, etc
A drawing of the part you construct in Autocad.
A group of machined or handmade parts that fit together to form a self-contained unit.
A piece of a product.
A presentation of a project in autocad.
Dimensions should NOT be duplicated, or the same information given in two different ways. Don't over-define or under-define the object.
No unnecessary dimensions should be used - only those needed to produce or inspect the part.
Dimensions should be placed at finished surfaces or important center lines.
Dimensions should be placed so that it is not necessary for the observer to calculate, scale or assume any measurement.
Dimensions should be attached to the view that best shows the shape of the feature to be dimensioned.
Avoid dimensioning to hidden lines, whenever possible.
Dimensions should not be placed on the object, unless that is the only clear option.
Overall dimensions should be placed the greatest distance away from the object so that intermediate dimensions can nest closer to the object to avoid crossing extension lines.
A dimension should be attached to only one view (i.e., extension lines should not connect two views).
Never cross dimension lines.
Avoid crossing extension lines when possible.
A center line may be extended and used as an extension line.
Leaders should slope at a 30, 45 or 60 degree angle.
Dimension numbers should be centered between arrowheads, except when using stacked dimensions where the numbers should be staggered.
In general, a circle is dimensioned by its diameter; an arc by its radius.
Holes should be located by their center lines.
Holes should be located in the view that shows the feature as a circle.
Extension lines start approximately 1/16" from the object and extend 1/8" past the last dimension.
The first dimension is approximately ½" from the object and each associated dimension spaced uniformly approximately 3/8" apart.
Always dimension the actual size of the object - not the scaled size.
Something that does not allow an object or one's self to complete an act.
A circle with a single number connected to an assembly component with a leader line to refer to parts.
A view of what the object would look like as a whole.
Images of the base on every side of the object
A list of materials or parts specified for a project. Also referred to as a bill of materials or BOM.
A rectangle at the bottom of a drawing stating the author.
A part that forms the outer edge of something.
The thing you draw your drawing on.
The size of something cut down but still in relation to the original number.