The leader of a growing company needs eyes in both the front and back of their head. They must look forward to project cash burn and capital needs to support their growth. But solid financial projections require reasonable assumptions rooted in past performance — sales growth, profit margins, fixed vs variable costs, cash flow and other key performance indicators (KPIs).
The fact is, you can't do a good job of planning for the future (forecasting) without timely, accurate and thoughtful scorekeeping (bookkeeping) to give you clear insights about the past.
Looking Forward and Looking Back
"Scorekeeping" and forecasting call for different sets of skills. In some larger companies, they're even organized as separate teams: an accounting team that keeps score and a finance team that analyzes results and forecasts ahead.