The sales process on Amazon begins with the product listing, and because Amazon has a sophisticated business model, this process and other important components are outsourced to the suppliers in Vendor Central. The listing of products on Amazon is therefore mandatory and must be carried out independently via Vendor Central. In order to map the process correctly, internal resources have to be created for the listing process. The product listing on Amazon can be done in different ways and depending on the category there may be different requirements for mandatory information. Products can be uploaded to the Amazon catalog both individually and in bulk. Depending on the category, the processing time can vary considerably in the time required for processing. While the product listing on Amazon works almost immediately in some categories, according to Amazon it can take 2 – 4 weeks in other categories.