Define finished-product quality before selecting a factory
The first OEM decision is not the lowest quotation. Define active specifications, acceptable lot variation, sensory quality, shelf life, and packaging protection so that factory capability can be evaluated against a real target.
Dosage form changes formulation and economics
Capsules, tablets, powders, drinks, and jellies have different requirements for flow, solubility, taste, heat stability, and packaging. The intended use level must also translate into a realistic daily serving.
Scale-up reproducibility must be documented
A successful prototype does not guarantee commercial consistency. Incoming inspection, process conditions, finished-product testing, deviation handling, and change control should become repeatable standards.