The Vehicle Development Activity consists of three stages, the Research and Development stage, the Production Preparation and Trial stage, and the Mass Production stage. The first stage is preparing the prototype order for evaluation, the second stage is preparing the sample part order for the trial dan the final stage will be the vehicle production for commercial. Processing orders experience delays because of the unrelated system from the prototype order to the sample part order. The objective of this research is to propose an integrated system to minimize the order processing time of vehicle production. The Toyota Business Practice and Ishikawa Diagram are used to analyze the causes of process delays as well as long lead times and design improvements to the order system. To solve the problem, the order process is improved using the existing sample part order system. The system is designed to have a sample part order tracking function so that the process can be recorded in the system and integrated. The expected result of the improvements is that the process of handling prototype orders has no delay in the process and reduces lead time orders from 30–34 days to 22–26 days.