SHELF LIFE / Standard Deviation / Postharvest biology / Model Calibration / Prediction error / Prediction Model / Postharvest Biology and Technology / External Validity / Diffuse reflectance / Fruit Ripening / Firm Value / Partial Least Square / Prediction Model / Postharvest Biology and Technology / External Validity / Diffuse reflectance / Fruit Ripening / Firm Value / Partial Least Square