The aim is to allow you to rapidly build your model, apply loads, and design the model for an appropriate set of design forces.
On a day to day basis, you do not need to be involved with the underlying analysis models to achieve this. Instead, you can focus on the design results.
To make this possible, Tekla Structural Designer automatically creates and analyzes multiple solver models, each one being based on a different but widely accepted approach.
By designing for the forces from all the solver models, you can be confident that each scenario has been catered for.