DeAngelo (1981b) agree with the opinion that the quality of the audit should be viewed from two sides: demand or input or contact with the client and supply or output or in connection with the auditor. Watkins et al. (2004) stated about 2 important things. First, ownership of resources in not more important than the use of these resources. A great accounting firm would not be more qualified than a smaller accounting firm if its resources are not used to give an opinion independently.