When evaluating a new project idea (like deciding whether to go through with it or not), manufacturing risk normally refers to the risk that you will design a product (or system or whatever), and not be able to manufacture it (or will have to spend an extra million bucks to be able to manufacture it). When a project begins, management will create a budget and start tooling up for manufacturing, spending a certain amount of money to prepare to make the new widget. There is a risk that at the end of the design cycle, when it's time to RTP (release to production) the new widget, they find out that their machines can't do the job, or there's some unplanned problem in manufacturing that will cost money to solve. To mitigate this, they might set aside a little extra money "just in case" they need more when it's time to launch. I think this is what you are referring to when you say manufacturing risk.
Manufactured risks are risks that are produced by the modernization process, particularly by innovative developments in science and technology. They create risk environments that have little historical reference, and are therefore largely unpredictable.
Manufactured risks are usually hazards which can be produced by your modernization procedure, specifically by simply modern advancements inside scientific disciplines in addition to technological innovation. Many people develop possibility environments that contain minor historical referrals, and are therefore mostly unstable.
