Should a matching set project start with OEM or ODM?

It depends on how complete the project information is. OEM is more suitable when the brand already has tech packs, confirmed measurements, fabric targets, trims, and construction details. ODM is more suitable when the brand has only reference images, a market direction, or an early collection idea. Matching set projects often benefit from ODM-level planning at the beginning because product roles, set coordination, fabric direction, and color logic need to be aligned before sampling.