Historical Figure Budgeting involves using the previous year's financial data as a baseline and adjusting it for expected changes, such as inflation, economic growth, or internal expansion. This method is efficient and simple to implement but can perpetuate past inefficiencies or 'budget padding'.
Zero-Based Budgeting (ZBB) requires every department to justify all of its proposed spending from scratch for each new period, starting from a 'zero' base. This technique is highly effective for cost containment and eliminating waste, though it is significantly more time-consuming and requires high levels of management skill.
Variance Analysis is the process of calculating and investigating the difference between budgeted and actual figures. The formula for a variance is simply:
The investigation of variances follows the Management by Exception principle, where managers only focus their attention on significant deviations from the plan. This allows them to use their time efficiently by ignoring areas where performance is largely on track.
It is vital to distinguish between Favourable and Adverse variances based on their impact on the business's bottom line. A variance is not 'good' or 'bad' based on whether the number is positive or negative, but rather on its effect on profit.
| Feature | Favourable Variance | Adverse Variance |
|---|---|---|
| Revenue | Actual > Budget | Actual < Budget |
| Costs | Actual < Budget | Actual > Budget |
| Profit Impact | Increases Profit | Decreases Profit |
The choice between Historical and Zero-Based budgeting often depends on the business environment. Historical budgeting is suitable for stable industries with predictable costs, while Zero-Based budgeting is preferred during periods of restructuring or when a business needs to drastically improve its profit margins.
Always check the context: When calculating a variance, first identify if the figure is a revenue or a cost. A 'higher' actual figure is only favourable if it refers to revenue; if it refers to costs, it is adverse.
Look for the 'Why': Exams often ask for the reasons behind a variance. Consider external factors (e.g., a sudden increase in raw material prices) versus internal factors (e.g., poor production efficiency or a successful marketing campaign).
Evaluate the Budget's Quality: A large variance might not mean poor performance; it might mean the original budget was poorly constructed or based on inaccurate data. Always question the assumptions used to set the budget.
Interconnectedness: Remember that one variance often causes another. For example, an adverse variance in marketing spend (overspending) might lead to a favourable variance in sales revenue (higher sales).
A common misconception is that a Favourable Variance is always a sign of success. For instance, a favourable cost variance in training might lead to long-term adverse variances in productivity or quality because staff are not properly skilled.
Another pitfall is treating the budget as a Rigid Constraint. If a business refuses to spend beyond its budget even when a highly profitable opportunity arises, the budget is hindering growth rather than facilitating it.
Managers may engage in Budget Padding (or 'slack'), where they intentionally overestimate costs or underestimate revenues to make their targets easier to achieve. This undermines the budget's role as an accurate planning tool and can lead to resource misal