Without sufficient design controls, a number of things can happen. Entire systems can fail due to the inputs not reflecting the standards of the industry. People can get fired after those entire systems fail. Without complete and accurate design controls there is nothing to ensure that people are getting a quality product that is safe. From the start with planning, an engineer has to ensure that all the right people are in the room. This can have a profound impact on the quality of your end product because you didn’t get the right information from the beginning because you never identified the correct technical experts at the planning stage. This has an effect on inputs because now your inputs don’t reflect that up to date knowledge of the industry. As someone mentioned before, the Samsung Note 7 failure is a huge industry failure and while you might have DHF’s for products in your company, you have to understand the failures in industry as well. The technical expert would have knowledge that very well might not be written down in your companies files. This is just one example of not having sufficient design controls but there are infinite examples. Sufficient design controls are a must.