P Pt cereno energi selaras is a coal mining company that applies an open-pit mining method and conducts overburden removal using the current equipment configuration of one cat 345 gc excavator and three iveco 682 haul trucks in the 345 gc–ec 23 fleet. the problem encountered in overburden removal activities is the inconsistency of productivity during several operating periods and the occurrence of excavator idle time, requiring an evaluation of the suitability of the number of haul trucks within the production system. this study aims to analyze the performance of the excavator–haul truck system and determine the optimal equipment configuration to achieve the production target. the research method was conducted through observations of excavator and haul truck cycle times, productivity and match factor calculations, as well as analysis using the finite source queuing model with the g/g/1 approximation approach. the results showed that the utilization of two haul trucks produced a throughput of 272,08 bcm/hour with a 4-minute time buffer, the utilization of three haul trucks produced a throughput of 332,77 bcm/hour with a 14-minute time buffer, while the utilization of four haul trucks produced a throughput of 335,08 bcm/hour with a 15-minute time buffer. the addition of one haul truck from three to four units only increased throughput by 2,31 bcm/hour, indicating that the performance improvement was relatively insignificant. based on the analysis results, the configuration of one cat 345 gc excavator with three iveco 682 haul trucks represents the optimal condition, with further system performance improvements focused on reducing operational delays to maintain the operational time buffer.