The stagger chart then provides the same forecast prepared in the following month, in the month after that, and so on. Such a chart shows not only your outlook for business month by month but also how your outlook varied from one month to the next. This way of looking at incoming business, of course, makes whoever does the forecasting take his task very seriously, because he knows that his forecast for any given month will be routinely compared with future forecasts and eventually with the actual result. But even more important, the improvement or deterioration of the forecasted outlook from one month to the next provides the most valuable indicator of business trends that I have ever seen. - Andrew S. Grove
Another sound way to anticipate the future is through the use of the stagger chart, which forecasts an output over the next several months. The chart is updated monthly, so that each month you will have an updated version of the then-current forecast information as compared to several prior forecasts. - Andrew S. Grove