The steps involved in generating a Tetra mesh are:
Repair the geometry before meshing.
Specify the geometry details.
Specify sizes on surfaces/curves.
Specify the behavior in small angles or in small gaps between objects.
Determine the desired mesh method.
Compute the mesh.
The computed mesh should be checked for errors and smoothed for quality as necessary. See Checking and Improving the Mesh in this manual. When satisfactory, it is ready for applying loads, boundary conditions, and so on, and for writing to the desired solver.