How to start a parametric study ===================================== By parametric study, we mean a standard study (defined in tab ETUDE) in which we want to vary one or more parameters. The study is as general as any study defined in astk. **Note** *The study must be valid before being based on the parameter set. It must therefore run without error. It is also important to optimize the study before applying it to a large number of parameter values.* The definition and launch of a parametric study are described in [:external:ref:`U2.08.07 `]. The launch is strictly identical to the launch of the nominal study alone. Only the "distrib" option should be set to **yes** in the Options menu. The calculations are started in parallel: see ยง :ref:`7.1 ` for specific options. .. _RefHeading__5329_2079996570: