9.4 Fabrication specifications: The devil is in the details Flashcards
What is the endpoint of a successful design project?
The endpoint of a successful design project is the set of plans that form the basis on which the designed artifact will be built.
What do fabrication specifications include and describe how they ought to be.
Fabrication specifications:
- include the final design drawings
- must be:
- clear
- well-organized
- neat
- orderly
- unambiguous
- complete
- transparent
What information must designers include in fabrications specifications?
Designers must include the following information in the fabrication specifications:
- physical dimensions
- materials to be used
- unusual assembly conditions (e.g., bridge construction scaffolding)
- operating conditions (in the anticipated use environment)
- operating parameters (defining the artifact’s response and behavior)
- maintenance and lifecycle requirements
- reliability requirements
- packaging requirements
- shipping requirements
- external markings (especially usage and warning labels)
- unusual or special needs (e.g., must use synthetic motor oil).
What are the three different types of fabrication specifications?
The three different types of fabrication specifications are:
- Prescriptive fabrication specifications
- Procedural fabrication specifications
- Performance fabrication specifications
When is a fabrication specification prescriptive?
Fabrication specifications are prescriptive when we specify a particular part and its number in a vendor’s catalog.
When is a fabrication specification considered procedural?
Fabrication specifications are considered procedural when we specify a class of devices that do certain things.
When is a fabrication specification considered as a performance specification?
When we leave it up to a supplier or the fabricator to insert something that achieves a certain function to a specified level, we are setting forth a performance fabrication specification.
