When we talk about Servuccion, we refer to systems of manufacture of services of very high complexity where there is usually direct interaction of the client, his need and the production process through the human agent or personal contact, as it happens in the processes of external consultation, in which the doctor specialist patient relationship determines the success of the act of production of health services. Based on this premise, this work seeks to describe a conceptual proposal based on Lean Healthcare and Personnel Scheduling Problem criteria, which optimizes the assignment of shifts of medical personnel in external consultation service systems in the case of a clinic that manufactures health services in the specialties of allergies and respiratory diseases,  which today given the COVID 19 pandemic, and the proliferation of other environmental vectors that generate this type of disease have taken on great relevance in terms of opportunity in the allocation of appointments to reduce the harmful effects on human health and with this generate positive impacts in terms of the opportunity of treatments.