% Change (Percent Change) - The percentage difference between a driver's primary value its comparison value. If revenue from widget A is $250 today and was $200 last week, the percent change is +25% (250/200 - 1). Independent Impact - How much a driver caused the overall metric to move when analyzing the driver in isolation. If a 25% increase in revenue for widget A drove $50 more in overall revenue, the overall impact of widget A is +$50. Incremental Impact - How much more a driver caused the overall metric to move when taking into account other already listed drivers. If a 25% increase in revenue for widget A drove $50 in additional revenue overall, but $30 of that additional revenue is explained by drivers already listed in the briefing because they have overlapping impact, then the incremental impact of widget A on overall revenue is +$20.