1. In the front viewpoint draw lines(splines) representing the shape of each part of the chair - the backrest + back legs, inner back rest, the front legs and the seat frame.
To make this chair, I used the loft tool:
"Lofting is an important method for 3D object creation. You create shape objects to serve as a path and any number of cross-sectional shapes. The path becomes the framework that holds the cross-sections forming your object.
The term lofting comes from early ship building. A large framework called a loft was built to hold the hull of a ship while it was assembled. The process of hoisting the ribs (cross-sections) of the hull into the loft became known as lofting.
A traditional method for building three-dimensional models of a modern vehicle design is to draw cross-sections at a number of key points. These cross-sections are cut-out to form two-dimensional templates that are then placed on a rail. The model builders fill in the space between the templates to generate the surface of the model. "
ref from: 3d Max help Guide