Establish the QMS, then operationalize one of its most-audited pillars.
A Quality Management System isn't an artifact you produce once and file away — it is the operating discipline that turns a design into a manufactured product. Stage 04 sets up the QMS framework (12 standard procedures across 9 pillars, aligned to 21 CFR 820 + ISO 13485), then drills into Supplier Qualification, the single most audit-cited area in medical device QMS deficiencies. Both deliverables become inputs to the 510(k) (Section 19, Manufacturing Information) and to any future Notified Body audit.