Design and Drawing for Production (DDP):

    Absolute Coordinates – coordinates located in relation to the Cartesian coordinate (X,Y,Z) system through the origin (0,0,0)

    Alphabet of Lines – standard lines used in the drafting industry to convey a specific meaning (e.g. object lines are thick and continuous and denote the object, hidden lines are light and dashed and indicated hidden surfaces, etc.)

    Annotation – notes, dimensions, tables, etc. added to a drawing to give extra meaning

    CAD – Computer-Aided Drafting

    Dimension – lettering or text on a drawing defining object sizes and locations

    Isometric – a pictorial drawing in which two horizontal axes at 30 degrees to a horizontal and vertical axis are used to show an object’s width, depth and height

    Multi-view Drawing – a drawing that shows at least 3 views of an object standard orthographic representation (not a pictorial)

    Oblique – a pictorial drawing in which the front view of the object is parallel to the projection plane and shown in its true size and shape. The depth is drawn at 45 degrees up from horizontal

    Orthographic Projection – a method of showing a three-dimensional object in two dimensions by showing various views (not a pictorial)

    Perspective – a pictorial drawing in which lines are projected to one or more vanishing points to show the depth of an object as viewed from a given position

    Pictorial Drawing – a single-view drawing showing an object in 3-D as it appears to the human eye

    Prototype – typically a “one-off” that is rapidly constructed to test out a design

    Relative Coordinates – coordinates located in relation to the last point specified

    Science – the study of nature and its properties

    Technology – the practical application of science to better the human condition

    Tolerance – the amount a dimension can vary and still allow for the part to function correctly in a given design


    Engineering & CAD (CAD-specific noted with a *):

    Analysis – the process of looking at the data to see if a given design or strategy is meeting the requirement under test

    Assembly Drawing* – a type of working drawing that contains views showing where and how the various parts of an object fit into the assembled product

    CAD* – Computer-Aided Drafting

    Closed Loop System – a system that uses feedback, typically in the form of comparing a desired output value to the actual output value, to regulate the operation of the system

    Constraint – a limit or boundary condition applied to an aspect of an object in a system

    Constructive Solid Geometry* – the process of using sweeps, unions and other mathematical processes to develop 3D shapes in a CAD system

    Copyright – the exclusive right to make copies, license, and otherwise exploit a literary, musical, or artistic work, whether printed, audio, video, etc.: works granted such right by law on or after January 1, 1978, are protected for the lifetime of the author or creator and for a period of 50 years after his or her death.

    Criteria – a standard by which something can be evaluated

    Engineering Design Process – an 8 step process detailing how a product is engineering and brought to market

    Ergonomics – the science of adapting the working environment to fit the needs of different people

    Exploded View* – a series of drawings that show how the parts of a disassembled object fit together

    Intellectual Property (IP) – The ownership of ideas and control over the tangible or virtual representation of those ideas.

    Open Loop System – a system that is free-running (i.e. no feedback)

    Open Source – intellectual property (typically hardware or software) that is made freely available to the general public by its creators

    Patent – the exclusive right granted by a government to an inventor to manufacture, use, or sell an invention for a certain number of years.

    Primitives* – basic geometric shapes (cubes, spheres, pyramids, etc.) used to create 3D objects in a CAD system

    Proof of Concept –the process of testing a prototype to see how well it meets the design requirements

    Prototype – typically a “one-off” that is rapidly constructed to test out a design

    Redesign – the process of re-engineering a device to improve features and/or take out cost

    Requirements – a list of design criteria that a given device must adhere to / meet

    Reverse Engineering – the process of taking apart a finished product that one did not create themselves to see how it works (and possibly to improve the design and/or take out cost)

    Stereo-lithography* – “3D printing” used most frequently in the creation of rapid prototypes to test design elements

Last Modified on November 14, 2019