What is the primary assumption behind the experience approach to forecasting?

The experience approach to forecasting is relies on the assumption that things will happen a fixed way in the future as they happened that way in the past. For example, if it has all the time taken you fifteen minutes to drive to the grocery store, then you will almost certainly assume that it will take you approximately fifteen minutes the next time you drive to the store. Likewise, financial managers often assume sales, expenses, or earnings will grow at fixed rates in the future as they grew at that rate in the past.