During the 1970s the profile was changed, so that it became the leading Swedish consulting company throughout the 1970s with some ten offices around the world.
The institute developed a method for organization development, based on a strong theoretical foundation that was inspired by American researchers such as Herbert Simon, Philip Selznick and James D. Thompson.
The SIAR school of management described strategy development and long range planning as a problem-solving and decision-making process.
Later, inspired by among others, Professors Chris Argyris and Donald Schon, Eric Rhenman, and other leading researchers and consultants at SIAR, contributed to the development of the theories of organizational learning.
Eric Rhenman was a guest professor at Harvard Business School 1974–76, later one more of the leaders at SIAR, Richard Normann, enjoyed a similar position.