# SensitivityIntegrator Command
For static analysis, the only option currently available is the following, which must be defined before the ‘analysis’ command.
```tcl sensitivityIntegrator -static ```
For the dynamic case, currently only the Newmark algorithm is available. Two command need to be used together:
```tcl integrator NewmarkWithSensitivity $gamma $beta ```

gamma

Newmark parameter gamma.

beta

Newmark parameter beta.

```tcl sensitivityIntegrator -definedAbove ```
Currently, ‘-definedAbove’ is the only option available in OpenSees. This means that the same integration scheme (i.e.,
‘NewmarkWithSensitivity’) is used to perform both response and response sensitivity analysis.

Reference:
Haukaas T., Der Kiureghian A. (2004). “Finite element reliability and sensitivity methods for performance-based earthquake
engineering.” Report No. 2003/14, Pacific Earthquake Engineering Research Center, April 2004.
Haukaas T., Der Kiureghian A. (2005). “Parameter sensitivity and importance measures in nonlinear finite element reliability
analysis.” Journal of Engineering Mechanics (ASCE), 131(10):1013-1026.