Nevertheless , as managerial planning requires increasingly accurate information for budgeting , this old version is usually abandoned as a firm grows . Activity based costing is a developed version of financial budgeting . Instead of using a single cost driver , it uses multiple cost drivers to divide costs . The approach gives a more realistic and accurate model of budgeting . If a functional based accounting is used instead of activity based accounting , then the following disadvantages would be resulted : Inaccurate financial target Inaccurate standards...











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