| F.E.M p version | F.E.M h version | ||||
| 100 elements | 125 elements | 150 elements | 175 elements | 200 elements | |
| Quadratic | 3.271 × 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 | 2.059 × 10−5 |
| Quartic | 1.541 × 10−5 | 7.683 × 10−6 | 1.681 × 10−6 | 1.621 × 10−6 | 0.331 × 10−7 |