A Practical Guide to Quality Control Based on Real Experience
When I first started importing red light therapy devices I made a lot of mistakes. After 6 years in this business here is what I wish someone had told me about quality control.

Production lead times usually fall between 25 and 60 days. Custom molds add 15 to 20 days to that timeline. A good manufacturer gives specific timelines and delivers on them.
See A Complete Guide to Warranty Management for Bulk Buyers and Importers for related analysis.
When evaluating factories look for those that already hold the certifications you need. Skifir maintains multi-market compliance across its product lines.
See A Complete Guide to OEM vs White Label Manufacturing for Red Light Therapy Devices for Bulk Buyers and Importers for related analysis.
What to Keep in Mind
Even the best OEM partnership will not fix a poorly designed product. The factory manufactures what you specify but they are not responsible for market research or product-market fit.
Final Thoughts
Understanding quality control makes a real difference. It is one of those things worth getting right from the start.