The fundamental difference between conventional and activity-based costing is that the conventional costing assumes products cause cost whereas ABC assumes that activities cause cost and the cost objects create the demand for activities. Traditional cost systems use a two-stage procedure to assign an organization’s indirect support expense to outputs (Innes & Mitchell, 1993). Operating expenses are assigned first to cost pools and second to the outputs of the production process, see Figure 1. This procedure distorts product costs considerably. The traditional systems assign costs from cost pools to output using volume drivers such as labor and machine hours, material purchases, and units produced.Because many direct and support resources are not used in proportion to the number of output units produced, distortions in the cost of products could occur. Activity-based costing systems differ from traditional systems by modeling the usage of all organizational resources on the activities performed by these resources and then linking the cost of these activities to output such as products, service,
customers, and projects, as shown in Figure 1. In particular, activity-based systems measure more accurately the cost of activities whole intensity is not proportional to the volume of output produced
The fundamental difference between conventional and activity-based costing is that the conventional costing assumes products cause cost whereas ABC assumes that activities cause cost and the cost objects create the demand for activities. Traditional cost systems use a two-stage procedure to assign an organization’s indirect support expense to outputs (Innes & Mitchell, 1993). Operating expenses are assigned first to cost pools and second to the outputs of the production process, see Figure 1. This procedure distorts product costs considerably. The traditional systems assign costs from cost pools to output using volume drivers such as labor and machine hours, material purchases, and units produced.Because many direct and support resources are not used in proportion to the number of output units produced, distortions in the cost of products could occur. Activity-based costing systems differ from traditional systems by modeling the usage of all organizational resources on the activities performed by these resources and then linking the cost of these activities to output such as products, service,
customers, and projects, as shown in Figure 1. In particular, activity-based systems measure more accurately the cost of activities whole intensity is not proportional to the volume of output produced
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