Ensuring IS Hardware and Software Support Mission-Critical Functions

C.

The correct answer is C. A comprehensive IS applications architecture.

A comprehensive IS applications architecture is a prerequisite to help ensure that IS hardware and software support the delivery of mission-critical functions. It involves designing a framework of information systems that includes all the hardware, software, databases, and other components necessary to support an organization's mission-critical functions. This architecture should ensure that all components are properly integrated and work together to support the organization's goals.

By having a comprehensive IS applications architecture in place, an organization can ensure that its hardware and software are aligned with its mission-critical functions. This architecture can also help to identify any gaps or weaknesses in the organization's information systems, allowing for corrective action to be taken before any problems arise.

Control over IS infrastructure expenditure (A) is important for managing the costs of information systems, but it is not a prerequisite for ensuring that hardware and software support mission-critical functions.

An independent audit of the process (B) can help to identify any weaknesses in the information systems and ensure that they are aligned with the organization's goals. However, an audit is not a prerequisite for ensuring that hardware and software support mission-critical functions.

Documented emergency change procedures (D) are important for ensuring that changes to the information systems can be made quickly and efficiently in case of an emergency. However, emergency change procedures are not a prerequisite for ensuring that hardware and software support mission-critical functions.

In summary, a comprehensive IS applications architecture is a prerequisite to help ensure that IS hardware and software support the delivery of mission-critical functions.