Final answer:
Control over security is generally not considered an advantage of a service bureau, especially for organizations that require stringent data security measures.
Step-by-step explanation:
The question is asking about the disadvantages of using a service bureau, which is a business that provides various services to other companies or individuals, particularly in the field of information technology. Not mentioned as an advantage of a service bureau is Control over security. Service bureaus might not be the best choice for an organization that needs strict data security over its operations since it involves handing over data and processes to an external company. This can lead to issues with data privacy, regulatory compliance, and security breaches. However, service bureaus indeed provide benefits such as the ability to add new services quickly, potentially lower processing costs, and fewer research problems since the bureau is specialized in the services they provide.