This study sets out to focus on the fashion clothing and retailing supply chain with objective to identify describe and develop a model of the different processes involved in the supply chain of flat knitted garments [1]. In the customer demand fulfilment process for fashion products lead time is an important factor and has an impact of fashion logistics key success factors such as Sell Through, Lost Sales and Customer Service Level [2]. The model developed and described of the supply chain is for a branded manufacturing fashion company and the aim of the paper is to identify and understand the role of lead time and Sell-Through factor in sourcing, design and production in a fashion logistics context. This paper is done as a case study of the Swedish fashion company J.Lindeberg. Flat knitted fashion products can be produced in three different production systems: Cut & sew, fully fashion and complete garment production. This study focus on the traditionally cut & sew and fully fashion production sourcing and production system. The result is a general model with starting point in customer demand and the final point in customer demand fulfilment with focus on the order fulfilment process and different sub processes here involved. The model describes the different processes involved in sourcing, product development, production and transportation of the physical product but also the required information for each process. The method used in this work is based on a literature survey, information from suppliers of knitting production equipment and a case study of a branded manufacturing fashion company. The paper draws conclusions about the impact of different processes and sub processes in the model with value added- and non value added activities with focus on lead times and Sell-Through factor and customer service level.