You want to turn a new idea or concept into a product. This can be a simple or a complex device. It may be entirely physical (hardware), software, or a combination of the two (e.g., an electro-mechanical system controlled by embedded firmware).

You may want or need to start with a prototype.

Following the conceptual stage, you may want to manufacture and/or assemble the product. That product may be a simple, single device, or a complex system of integrated devices.