Material Mix Variances
Material mix variance is a type
of variance in cost accounting that measures the impact of using a different
mix of materials than what was planned or expected. It is calculated by
comparing the standard mix ratio of the materials to the actual mix ratio of
the materials used in production, and then multiplying the difference by the
standard cost of the materials.
The standard mix ratio represents
the proportion of each material that should be used in a particular product or
production process to achieve the desired quality and quantity. The actual mix
ratio represents the proportion of each material that was actually used in
production.
If the actual mix ratio differs
from the standard mix ratio, this can result in a material mix variance. If the
actual mix ratio uses more of the higher cost material than expected, this will
result in an unfavorable variance. On the other hand, if the actual mix ratio
uses more of the lower cost material than expected, this will result in a
favorable variance.
Analyzing material mix variances
can provide insight into factors that impact production costs, such as changes
in raw material prices, production processes, or product design. This
information can be used to identify opportunities for cost savings and process
improvements.
Let's say a company produces
1,000 units of a product and uses two materials: Material A and Material B. The
standard mix ratio for the materials is 60% Material A and 40% Material B. The
standard quantity of Material A required per unit is 4 KG, and the standard
cost per KG of Material A is INR 4. The
standard quantity of Material B required per unit is 3 KG, and the standard
cost per KG of Material B is INR 3.
The actual mix ratio for the
materials used in production is 70% Material A and 30% Material B. The actual
quantity of Material A used is 2,500 KG, and the actual quantity of Material B
used is 1,000 KG.
Using this information, we can
calculate the material mix variance as follows:
Actual Mix Proportion = 70%
Material A and 30% Material B
Standard Mix Proportion = 60%
Material A and 40% Material B
Difference = (70% - 60%) Material
A + (30% - 40%) Material B = 10% Material A - 10% Material B
Standard Total Cost = (2,500 KG
of Material A x INR4 per KG) + (1,000 KG of Material B x INR3 per KG) = INR 13,000
Material Mix Variance = (10%) x (INR
13,000) = INR 1,300 favorable variance
This means that the company used
more of Material A than expected, resulting in a favorable variance of INR 1,300.
The variance can be analyzed to determine the reasons for the change in the
material mix, such as changes in supplier pricing or product design, and
corrective actions can be taken to optimize the material mix and improve
profitability.