This matrix is recommended for situations in which time is of the highest importance in making a decision. the matrix operates like a funnel. you start at the left with a specific decision problem in mind. the column headings denote situational factors that may or may not be present in that problem. you progress by selecting high or low (h or l) for each relevant situational factor. proceed down from the funnel, judging only those situational factors for which a judgment is called for, until you reach the recommended process.