1. Use this form to initialize the vulnerability model.
2. Use the 'Add Probability Mass Function' & 'Add Discrete Function' buttons to generate as many vulnerability function forms as needed. Next populate the table and form for each function.
Generate a NRML file by click 'Convert to NRML' when done populating the tables.
3. Copy and paste the NRML file for use in the OpenQuake Engine.