The matrix methods of structural analysis are, by now, well known. However, once large structures, such as the present-day skyscrapers, that consist of a vast number of components, are dealt with, various difficulties arise. Some of these difficulties are due to the fundamental approach to structural problems, while others are due to the speed and storage facilities of contemporary computers. A third group of difficulties is due to the various techniques that may be used in the processes of analysis, iteration, etc.
K.I. Majid and D. Anderson