A matrix chart is a visual grouping of two, three or four types or categories of information. The matrix shows how each piece of information is connected to the others signified by arrows or lines connecting each group.
A matrix chart can be illustrated with several different shapes, such as the L, T, Y, C, X and roof-shaped charts. They connect groups of information with color codes, while a legend distinguishes each group from the others. The matrix chart's purpose is to show order of importance between groups, how groups interact or are related, roles or duties of each group, strengths and weaknesses of each component and relevant measurements of each group.