This type of chart can also be useful in identifying potential problem areas in an organization's sales processes.
A funnel chart displays values as progressively decreasing proportions amounting to 100 percent in total.
[4] Ideally the funnel chart shows a process that starts at 100% and ends with a lower percentage where it is noticeable in what stages the decrease happens and at what rate.
If the chart is also combined with research data, meaning quantified measurements of just how many items are lost at each step of the sales or order fulfillment process, then the funnel chart illustrates where the biggest bottlenecks are in the process.
Note that unlike a real funnel, everything that is "poured in" at the top doesn't flow through to the bottom.