Rolling Forecasts and Trend Reporting

Definition

A rolling forecast updates continuously (e.g., quarterly, dropping the oldest quarter and adding a new one), maintaining a 12- or 18-month planning horizon that always reflects current assumptions. Trend reporting measures costs and performance against trend lines (last 12 months' average, month-on-month change, annualized growth rate) rather than against a fixed budget established a year prior when assumptions were different.

In the Book

Bogsnes describes the Borealis experience (Chapter 3) with the exhausting annual budget cycle: the team made two budgets in 1994 (for the tail of 1994 and for 1995) and was completely exhausted. When 1995 began, business conditions had already shifted, making budget assumptions obsolete before they could be used. Trend reporting was introduced to break "calendar-year dominance"—they moved away from annual cycles and instead reported trends on costs, production, and smaller investments over periods ranging from 6 to 15 months depending on the domain.

The key insight was adding a "% change" number to trend graphs. Bogsnes illustrates (Chapter 3, Exhibits 3.8 and 3.9): a production unit cost that appears flat when graphed might actually be growing at 1% month-on-month—a serious problem in a declining-margin business where costs must continuously fall. Traditional budget reporting "hides" such realities by allowing higher budgets during negotiation. Trend reporting makes trends undeniable. One Borealis year, senior managers symbolically forfeited part of December salary to signal commitment to breaking an upward cost trend.

The Reitan Group (Chapter 2) uses a lean four-quarter rolling forecast updated continuously, combined with a three-year forecast, avoiding the "preparation cost and inflexibility" of annual budgets. When needed, the forecast is updated more frequently.

Why It Matters

A fixed budget assumes conditions in month 6 look like assumptions made 6 months earlier. In VUCA conditions, this is almost always wrong. Rolling forecasts stay grounded in current reality. Trend reporting surfaces slow changes (costs drifting up, efficiency declining) that get buried in annual budget comparisons. Together, they support continuous adaptation without the need for either a "reforecast" meeting that replays budgeting politics or a "ignore the budget" culture that abandons planning discipline.