Constraints and Considerations in Designing Computer Systems
このQ&Aのポイント
Learn about the constraints and considerations in designing computer systems, including standards and market requirements.
Understand the impact of standards on design, including their role in promoting interoperability and reducing costs.
Explore the influence of market requirements on design decisions, including backward compatibility and operating system choices.
翻訳をお願いしたいです。コンピューター関係の書物の文章です。
翻訳をお願いしたいです。コンピューター関係の書物の文章です。
Besides constraints on these five resources, two major constraints are purely social :standards and market requirements.
・Standard force the design to conform to some widely agreed-upon requirements that may or may not be appropriate for that particular design.
Though standards are essential to allow interoperability and can reduce costs by promoting competition, poorly designed standards severely restrict the design space.
Worse yet, an underspecified standard may lead to faulty implementations that are not even interoperable.
A good example of a bad standard is the Q.2931 standard for signaling in ATM networks.
The standard is unnecessarily complex, and therefore hard to implement and hard to modify.
Yet, to succeed in the marketplace, switch manufacturers have to obey it, thus slowing the rate at which ATM networks spread.
・Market requirements, like poorly designed standards, are unfortunate realities.
A company may decide that products being designed must be backward-compatible with a previous product, or that they must use a particular operating system, or that they must support some set of standards.
These essentially political decisions set the framework for a design.
Market requirements may also determine the amount of human effort that can be expended on a design project.
It is remarkable how much time is spent on building graphical user interfaces, sometimes at the expense of the system underlying the interface!
