Final answer:
A change to a product or service that alters its appearance or performance is known as sustaining innovation, which is different from radical or disruptive innovations that revolutionize industries or create new markets.
Step-by-step explanation:
When a change is made to a product or service that changes its appearance or performance, this is known as sustaining innovation. Sustaining innovations are typically improvements that make products better, but they do not necessarily create new markets or drastically change how an industry operates, unlike disruptive innovations. Examples include making a car more fuel-efficient or enhancing the user interface of a software application.
In contrast, radical innovation refers to major breakthroughs that advance technology significantly. Disruptive innovation can upend markets by making old technologies or practices obsolete, incredibly altering industries and creating new ones. Incremental innovation, meanwhile, refers to small improvements or updates made to products or services.