What is defined as a defect or enhancement related to a product?

The term that is defined as a defect or enhancement related to a product is "Issue." In the context of product management and software development, an issue refers to any problem or bug that affects the performance, usability, or quality of a product. This encompasses not only bugs or defects that need to be resolved but also enhancements that might improve the functionality or usability of the product. Identifying and tracking issues is essential for maintaining product quality and ensuring that it meets user needs.

While "Feature" typically refers to a new capability or functionality added to a product, and "Update" generally refers to improvements or changes made to software, these terms do not specifically encompass defects or problems. "Change Request" usually describes a formal proposal for an alteration in the system or product, which may be driven by enhancements or issues, but it is a broader concept that requires formal approval and does not inherently define the problems or improvements themselves. Therefore, the most fitting term for a defect or enhancement in regard to a product is indeed an "Issue."