Imagine you are a consultant advising a company on improving its Management Information System (MIS) infrastructure.

Explain the three forms of MIS infrastructures and provide examples of what each form supports within a business organization.

Now, focus on the concept of an agile MIS infrastructure. List and describe the characteristics of an agile MIS infrastructure. Then, explain why each characteristic is critical for supporting change within the organization's operations and decision-making processes. You can use real-world examples or scenarios to illustrate your points.