A plate (0.3 x 0.3 m plate size) load test performed on clayey soil gives ultimate settlement of 2.2 mm. The ultimate settlement of 2 x 2 m isolated footing will be:

Geotechnical engineering, also known as geotechnics, is the branch of civil engineering concerned with the engineering behavior of earth materials. It uses the principles of soil mechanics and rock mechanics for the solution of its respective engineering problems. (Source: Wikipedia)