| attribute_sim_dep | Simulate the Attributes with the Assumption of Dependent Attributes |
| attribute_sim_ind | Simulate the Attributes with the Assumption of Independent Attributes |
| demand_sim | Simulate the demand for new products |
| npdsim_bass | Calculate the Bass probability |
| npd_data_sim | Simulate the demand and attributes for new products |
| shape_sim | Generate the shape of demand |
| shape_sim_bass | Generate generic Bass shapes |
| shape_sim_ig | Generate generic shapes for the introduction and growth phases |
| shape_sim_random | Generate random (Bass, Trapezoidal or Triangular) shapes |
| shape_sim_trapezoid | Generate trapezoidal shapes |
| shape_sim_triangle | Generate triangular shapes |