A diagnosis of the traceability parameters on the palm oil extraction rates was carried out from the huilerie centrale mill and from the Antenne 2 to determine the origin of the fluctuation of the oil extraction rates with a view to an optimization. Average rates of oil extraction, green diets and oil loss on treatment methods were determined and compared between the plants through statistical variance analysis of the statistica software at the critical threshold of 5%. The average rates of green and oil extraction are different at the huilerie centrale mill (5.2 ± 1.2 and 20.58 ± 1.32) and at Antenne 2 (2.6 ± 1.1 and 24.33 ± 1.28). With regard to the average oil loss rates obtained, a difference was observed in defibration (0.54 ± 0.05 against 0.52 ± 0.03), destemming (1.32 ± 0.18 against 1.08 ± 0,28 and) respectively at the huilerie centrale mill and the Antenne 2. However, at the clarification the rate of oil loss recorded at the central mill (0.86 ± 0.50) is lower by compared to that of Antenne 2 (1.23 ± 0.35). In addition, the coefficients of variability show a high variability of the rates of green schemes and oil losses at the clarification with proportions that do not respect the standard respectively of 100% and 60% unlike the Antenne 2. All these differences show that the quality of the diets and the treatment methods can be the basis for the variability of oil extraction rates in the production plants. Keywords: Elaeis guineensis, Palm oil, extraction rate.