Let us know the   critical dimensions/specs so that we can prioritize accordingly
 Let us know usage   of the product/ parts if it is not business secret. This might affect   manufacturing processes and quality checking measures.
 If applicable,   please let us know how you check for quality. 
 Carefully check for   sample qualities before having us do mass production.
 Use formal   Engineering Change Management procedures
 We take full   responsibility for product quality.
 First of all, we   will do everything we can to only ship quality products to customers. 
 If a quality issues   is identified, we with either replace them or fully refund the customer.