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Developing an Attributes List

Developing an Attributes List. Using the answers from your Questions List to develop a list of attributes for the design. Taken from engineering design: a project-based introduction by dym & little.

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Developing an Attributes List

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  1. Developing an Attributes List Using the answers from your Questions List to develop a list of attributes for the design. Taken from engineering design: a project-based introduction by dym & little

  2. An Attributes List contains a list of objectives, constraints, functions, and implementations. • Objectives (or goals) are expressions of the desired attributes and behavior that the client or potential users would like to see in the designed object. • Constraints are restrictions or limitations on a behavior or a value or some other aspect of a designed object’s performance. Government regulations are often a source of design constraints. • Functions are the things a design is supposed to do – the actions that it should perform. • Requirements are functional or non-functional specifications that the design must meet. Requirements are often generated by the client.

  3. Here is a partial, uncategorized Attributes List for a “safe ladder” design. • Used outdoors on level ground • Used indoors on floors or other smooth surfaces • Could be a stepladder or short extension ladder • Step deflections should be less than 0.05 inches • Should allow a person of medium height to reach/work at levels up to 11 feet • Must support weight of an average worker • Must be safe • Must meet OSHA requirements • Must be portable between job sites • Should be relatively inexpensive • Must not conduct electricity • Should be light

  4. Here is a partial, categorized Attributes List for a “safe ladder” design. • Objectives • Used outdoors on level ground • Used indoors on floors or other smooth surfaces • Should be relatively inexpensive • Should be light • Must be portable between job sites • Constraints • Must be safe • Must meet OSHA requirements • Must not conduct electricity • Step deflections should be less than 0.05 inches • Functions • Should allow a person of medium height to reach/work at levels up to 11 feet • Must support weight of an average worker • Requirements • Must weigh less than 20 pounds

  5. Here is an example of a partial (uncategorized) Attributes List for a 2008 BEST robot • Must be less than 24 pounds • Must fit into a 24-inch cube • Able to pick up individual plane parts • Able to assemble plane parts • Able to drive over a 1” x 4” board • Able to close and open switch • Should have zero-radius turn • Should be able to carry a fully-assembled plane • Should be able to lift a fully-assembled plane to a height of at least 36 inches

  6. Below are some tips for developing an Attributes List. • Start with a good list of questions. • Use the answers to the questions to begin creating the Attributes List. • You don’t have to categorize the list at the beginning of the process, unless you prefer to start with the categories. • The attributes that can be quantified become the basis for the Design Specifications.

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