| F.E.M p version | F.E.M h version | ||||
| 50 elements | 75 elements | 100 elements | 125 elements | 150 elements | |
| Quadratic | 1.071 × 10−3 | 2.138 × 10−3 | 6.306 × 10−4 | 4.006 × 10−4 | 1.303 × 10−5 |
| Cubic | 2.402 × 10−4 | 1.485 × 10−4 | 2.759 × 10−5 | 2.051 × 10−5 | 2.759 × 10−5 |
| Quartic | 1.541 × 10−5 | 7.683 × 10−6 | 1.481 × 10−6 | 1.6211 × 10−6 | 0.381 × 10−6 |