With Industrial Design a key aspect is that design precedes manufacture, nowadays almost exclusively through computer aided design (CAD). This is usually preceded by a brainstorming and sketching phase. The process can be focused on simplicity and producibility for low volumes, like when prototyping, but also on mass production of hundreds of thousands of products. It all falls under the umbrella term; Industrial Design Engineering.
Almost every single product that one uses in daily life has gone through the process industrial design. Design that takes all aspects of a product into consideration; appearance, function, producibility, user experience and cost, to name a few.