Final answer:
Completeness is the degree to which information includes all necessary data about every relevant object or event for decision-making, which is crucial in business and other fields to ensure informed decisions.
Step-by-step explanation:
The degree to which information includes data about every relevant object or event necessary to make a decision is completeness. This concept is essential for decision-making in various fields such as business, where accurate and complete data is necessary for informed decisions to be made. In the context of economics and decision theory, completeness ensures that all necessary information is present to evaluate options and outcomes. While making hundreds of decisions daily, having complete information can help reduce the imperfections in our decision-making process impacted by information overload.