This paper proposes operational systematics for the design phase, specifically the conceptual design, considering integration with manufacturing variables, promoting the concurrent engineering in the knitted industry. The bibliographic references are analyzed to compose a theoretical framework about models for the product development process (PDP). In order to understand the PDP practiced in the knitting industries, field research was conducted in four large companies located in Brazil. The PDP models identified were compared with the theoretical frameworks for generic products. Based on this analysis and the contribution of three specialists in knitting development, a methodology is proposed to support the conceptual knitting design, considering manufacturing aspects and including some tools. This methodology is evaluated through a simulation, where two groups use the proposed methodology, and the indicators are compared with the third group with a high experience that does not use it to develop a conceptual knitting project. Among the results, the article proposes and evaluates a systematization, adapted to the Brazilian local reality and needs, considering the integration between product design and manufacturing phases.