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Specify requirements (figure out what you need to keep in mind when making the product - for example, what materials, weight, cost)
Choose the best solution
Do Background research (look at existing designs that solve that problem to avoid mistakes made in the past)
Draw the design
Brainstorm solutions (think about and record different ways to design something)
Test the prototype or product
Build a prototype of the product
Communicate results (share your product and results with others)
If needed, redesign, rebuild and retest
Define the problem (what is the need?)