A model for a better understanding of the matrix structure

The Galbraith model is analyzed as an instrument to differentiate matrix structures. Then, other variables are introduced to improve the model, and a matrix index is formed based on these new variables. This index is a valuable tool for the management consultant and for the researcher on matrix structures because it can be used to highlight the differences among the several types of matrices. The data presented were collected from 211 technical researchers and managers of 17 Brazilian research institutes operating in a matrix mode. A comparison is made between the Galbraith model and the matrix index. As an example of the use of the matrix index, a comparison is made between the matrix structures of institutes with high and low percentage of income from the sale of projects. Results showed that institutes with higher percentage of income coming from the sale of projects had a matrix design with more emphasis on the project structure.