Özet:

Organizations using traditional cost systems are having difficulties in fulfilling today’s business requirements in competitive markets. An efficient and effective cost system should be in place for the satisfaction of needs of competitive environment in which technology, digitalization and efficiency are the key drivers. In the literature, allocation of indirect costs and also calculation of unused capacity of the resources are the hot topics of the cost and performance evaluation research. An effective costing system known as Time-Driven Activity Based Costing system (TDABC) can be used for the measurement of product or service costs with accurate and reliable data considering unit costs of resources allocated to activities and the time length required for execution of these activities and the determination of unused capacity. This system properly elaborates the cause and effect relations between resources and their costs identifying the activities/ sub-activities. This article presents a case study which shows all the stages of TDABC in the internal audit department of a bank by analyzing the operations of the department and defining all the activities that consume the resources. The goal of this paper is to design a cost accumulation system to calculate the cost of audits of the internal audit department of a bank by implementing TDABC system.

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