Different types of decisions include individual decisions (made by one person), group decisions (made collaboratively), programmed decisions (repetitive tasks with set procedures), strategic decisions (long-term planning), tactical decisions (short-term responses to issues), and non-programmed decisions (unique situations requiring new approaches) 

Information systems support managers and their decision-making by providing access to relevant data from various sources, allowing them to analyze trends, identify patterns, and make informed choices based on accurate and up-to-date information, ultimately optimizing operations and achieving strategic goals within the organization.

Business intelligence (BI) and business analytics support decision making by providing access to comprehensive data insights, allowing businesses to identify patterns, trends, and potential issues within their operations.

Different decision-making constituencies within an organization utilize Business Intelligence (BI) tools based on their specific needs.