“We are experiencing many issues with our production, can you help us with this?”
If I had a cent for every time that I heard that sentence I would probably be retired by now.
Most fashion brands (especially if they are new or small), assume that since production is the last part in the process they’ll just worry about it when they get to it, and rather choose to focus mainly on designing and making the perfect samples.
NEWS FLASH - that is the wrong approach.