Abstract: Present computer software tools for monitoring system performance variables particularly for online activity, are not convenient to use and are not overly effective in their use for identifying critical situations. There is a need for users to be able to readily deduce the accumulated effect of a number of variables on the functioning of a computer system. This is often made more difficult when scales of absolute values of the variables involved are significantly different. The multi-variable graphical interface and method of the present invention addresses many of these concerns. A graphical user interface and method is described wherein at least one zone appears on the display representing threshold values for the variables and overlying the zones, representations or line graphs of one or more of the variables is provided. Thus, their results and accumulated indications as to the functioning of the computer system based on the plurality of performance variables selected is provided in a visual manner.