# Analysis Wizard : Solver Option

All analysis options are controlled from the analysis wizard and depend on the selected solver option.

## Definition

**Task Name**

This is a name to associate with this task. This is used as the basis of the analysis case name, so that if there is more than one modal analysis the particular modes can be clearly identified.

**Solution Type**

The solution type breaks down into a number of main categories:

**Static**– linear static, static P-delta, nonlinear static and nonlinear static explicit analysis.**Dynamic**– modal, modal P-delta and Ritz analysis.**Dynamic response**– response spectrum, pseudo response spectrum, harmonic analysis, linear time history analysis, footfall analysis and periodic load analysis**Buckling**– modal or component buckling analysis.**Soil-structure**– raft analysis.**Bridge**– bridge optimisation analysis (pre-analysis and no analysis case should exist).**Miscellaneous**– mass and LS-DYNA analysis**Lightweight structures**– form finding analysis.**Post-processing**– analysis envelopes.**Diagnostic**– model stability and model stability P-delta analyses

**Solver, Task and Initial Case**

The solver option depends on the analysis requested. The task number is determined by GSA, but the initial case can be specified by the user.

**Imperfection**

GSA can apply a range of imperfections in an analysis. The most commonly specified imperfection is an imperfection which is a function of height. This option allows for an imperfection in the x or y direction as a linear function of height. More complex imperfections are set in the Advanced options.

**Analysis Stage**

The analysis task will refer to the selected stage. If stages are not required the 'Whole mode' option includes everything in the model.