Budgets are quantitative expressions of plans that are used for planning and control. For planning, budgets ensure spending follows a plan and supports objectives. For control, budgets provide standards to evaluate performance against. As the head of budgeting, one would not be overly influenced by pessimistic or optimistic individuals, but use reasonable assumptions to develop an accurate master budget. Even small firms create cash budgets because cash flow is critically important. Static budgets can mislead if not adjusted for changes, while flexible and activity-based budgets improve accuracy.