There are many principles of design, many facets to the arts and crafts in society, but many are linked to the same fundamental principles. The main principles applied to industrially-designed products can be defined as: unity, proportion, balance, harmony, contrast, rhythm and simplicity. The artist or designer is interested in these concepts, and art in general may be thought of as a combination of these principles: line, colour, hue, value, intensity, tone, mass, form, shape, texture, space, style, medium and the most subjective quality of all - beauty. The sculptural artist may only take into account some of the ideas when working, as a three-dimensional object has different characteristics to that of a two-dimensional work.
Instantaneous design ideas (the hard work of construction & engineering coming later)
Construction from the ground up (working towards a grand idea)
Working through a variety of ideas (a combination of influences, and competing designs)
Additive synthesis (the whole made up of smaller individual components)
Subtractive synthesis (the object made by removing parts of a greater form)
Using ready-made materials (plastic, metal, rubber, wooden parts - available from domestic & industrial sources)
Paints, laminates, glosses, lacquers, upholstery - depending on the sculptural form.
There may be some mechanical interaction of components (eg: the articulated rings of an armillary sphere).