Tomato is a raw material that easily deteriorates once harvested and loaded on trucks, losing juice and flesh. Therefore, the reduction of trucks’ waiting times in the receiving area of a processing plant can allow reducing tomato waste. In this article, we develop a model that aims to keep a continuous flow of fresh tomato to a paste processing plant and to decrease trucks’ waiting times in the plant receiving area. The model is used in a real case of a tomato paste company. The obtained solutions present a better allocation of the harvest shifts, allowing more uniform truck arrivals to the plant during the day. Therefore, trucks waiting times are reduced, decreasing raw material deterioration.