Stuck without progress working on thesis - worried about failure
Having worked with master's students in an applied research lab, I am fairly confident that you are not expected to come up with a solution that will dramatically change the production process and lead to great profits. Your stipend is not contingent on your work delivering monetary returns; research doesn't work like that.

You are engaged by them to apply your skills, use your time and energy to contribute to their problem. The magnitude of that contribution and its ultimate impact on the company could vary wildly. So steer yourself out of both extreme expectations (that you will fail completely, vs you will create a revolution through your work) and put in your honest, best efforts. Be systematic and document everything. What you see as a negative result or failure now could be a positive confirmation to a more experienced researcher at some time in the future. Don't worry too much about the ultimate outcome, but don't procrastinate either. Keep executing chunks of work, and once again, document everything.

Remember, you justify your stipend through your efforts, not through the outcomes.