* Material selection: The choice of materials used to make a part can have a significant impact on its usefulness. For example, a part made of a strong and durable material will be more useful than a part made of a weaker or more brittle material.
* Design: The design of a part can also affect its usefulness. A part that is well-designed will be more likely to function properly and be easy to use.
* Manufacturing process: The manufacturing process used to make a part can also affect its usefulness. A part that is made using a precise and repeatable process will be more likely to be consistent in quality than a part that is made using a less precise or less repeatable process.
* Quality control: The quality control process used to ensure that a part meets the required specifications can also affect its usefulness. A part that has been properly inspected and tested will be more likely to perform as expected.
* Cost: The cost of a part can also be a factor in determining its usefulness. A part that is too expensive may not be worth the investment, even if it is of high quality and well-designed.
When considering the usefulness of a part of a manufactured item, it is important to weigh all of these factors carefully. The most useful parts will be those that are made of high-quality materials, designed well, manufactured using a precise and repeatable process, properly inspected and tested, and available at a reasonable cost.