What are the different types of decisions, and how does the decision-making process work?

(1) What are the different types of decisions, and how does the decision-making process work? (2) List and describe the different levels of decision-making and decision-making constituencies in organizations. (3) Explain how their decision-making requirements differ. (4) Distinguish between an unstructured, semi-structured, and structured decision. (5) List and describe the stages in decision making.