Customized clothing can be divided into two types: with drawings and without drawings.
If your company has design ability, then:
There are drawings → provide (material, process / effect requirements, quantity and other specifications) → inquiry → negotiate the contract → send samples → test samples → ship bulk goods
If your company has no design ability, then:
There are drawings → provide (material, process / effect requirements, quantity and other specifications) → inquiry → negotiate the contract → check the design draft for confirmation → issue the sample → test the sample → release the bulk goods.