Finally, with enough time, money, and perseverance, the design will be ready for production.
This might consist of the manufacture of a single final version of the design,
but more likely will mean making thousands or even millions of your widget. The danger,
expense, and embarrassment of finding flaws in your design after making large
quantities of defective devices should inspire you to use the greatest care in the earlier
steps of the design process to ensure that it is properly engineered