A back kitchen management system. 4d single mode means a back kitchen management system. School cafeteria management is a back kitchen management system that is more recognized in the domestic catering industry. The so-called 4D, refers to the kitchen management is subdivided, standardized, clear, to ensure that the responsibility to the person, the work to the post, the 4D model that is organized in place, the responsibility is in place, the training is in place, the implementation of the place.