: inflammation of several muscles at once; specifically : an inflammatory muscle disease of unknown cause that affects muscles and chiefly skeletal muscles and is characterized especially by weakness of the muscles (such as those of the shoulder, neck, or hip) closest to the trunk â see dermatomyositis.
Direct Costs and Indirect Costs. Manufacturing costs may be classified as direct costs and indirect costs on the basis of whether they can be attributed to the production of specific goods, services, departments or not. Direct costs can be defined as costs which can be accurately traced to a cost object with little effort. Cost object may be a product, a department, a project, etc. Direct costs typically benefit a single cost object therefore the classification of any cost either as direct or indirect is done by taking the cost object into perspective. A particular cost may be direct cost for one cost object but indirect cost for another cost object.
Tip. 1  You may also calculate the overhead rate based on direct labor hours. 2  Divide the overhead costs by the direct labor hours over the same measurement period. 3  In the example, the overhead rate is $20 for each direct labor hour ($2,000/100). Divide the overhead costs by the direct labor hours over the same measurement period. 2  In the example, the overhead rate is $20 for each direct labor hour ($2,000/100).