Commercial Viability
As you make products in school you are only making a one-off product but if you want to make any profit you need to think about how it could be made, using batch or mass production processes. You also need to think about how you might need to change the design for a wider market. Sometimes you might even have to compromise on your design so that it can be profitable.
Styling
You also need to match the style to the user which sometimes mean making them less individual and reducing the amount of colour schemes.
Manufacturing Processes
Packaging
You need to consider packaging when looking at commercial viability
You need to consider packaging when looking at commercial viability