Explanation
The difference between the actual spend and budgeted spend is known as variance. The formula for variance is:
Variance = Actual spend - Budgeted spend
Variances can be adverse/unfavourable or favourable ie they can be positive or negative.
Be very careful with these terms. A positive or a negative variance may be favourable or it may be adverse/ unfavourable.
Adverse variances
Adverse variances are those variances that are unfavourable to the firm. Examples would be sales below plan; costs above budget, cash receipts lower than expected, and overtime payment more than forecast.
Favourable variances
Favourable variances are those variances that are beneficial to the business. Examples would be sales ahead of plan, costs below budget, and wages below forecast.
Positive variance
A positive variance occurs where 'actual' exceeds 'planned' or 'budgeted' value. Examples might be actual sales are ahead of the budget.
Negative variance
A negative variance occurs where 'actual' is less than 'planned' or 'budgeted' value. Examples would be when the raw materials cost less than expected, sales were less than predicted, and labour costs were below the budgeted figure.
When the operators create saving, it means that the Actual spend is less than Budgeted spend. Therefore the variance is negative.