The present research has been carry out to propose an improvement plan that allows a customer quality service in the tourist restaurant "El Mochica de Doña Fresia" in the Huanchaco District. The problem formulated for the investigation was Will an improvement plan allow a quality service in customer service at the tourist restaurant "El Mochica de Doña Fresia" Huanchaco District - 2018? It was propose as a hypothesis: An improvement plan based on a diagnosis will allow a quality service in customer service at the tourist restaurant "El Mochica de Doña Fresia". Huanchaco District - 2018. The sample according to the study was made up of 65 diners who go to the tourist restaurant "El Mochica de Doña Fresia" in Huanchaco District. The research design used was nonexperimental transversal descriptive and the methods were hypothetical - deductive, analysis - synthesis and inductive - deduct...