The process of determining the amount of indirect manufacturing costs assigned to a specific product, job, or process involves several steps. It begins with establishing a predetermined overhead rate. This rate is calculated by dividing estimated total overhead costs by an estimated activity level. Common activity bases include direct labor hours, machine hours, or direct material costs. Once the rate is established, the allocated overhead is found by multiplying the predetermined rate by the actual activity level during the period. For example, if the predetermined overhead rate is $10 per machine hour and 500 machine hours were used, $5,000 of manufacturing overhead would be assigned. This assignment provides a more complete picture of production expenses.
Accurately determining the assignment of these indirect costs is crucial for several reasons. It allows for better product costing, which in turn supports informed pricing decisions and profitability analysis. Moreover, consistent and transparent allocation of these costs enhances financial reporting and facilitates comparison of manufacturing performance across different periods or departments. Understanding the historical trend and variances in overhead allocation provides valuable insights for cost control and operational efficiency improvements. This process ensures that all production costs, both direct and indirect, are appropriately reflected in the value of finished goods.