Which of the following is essential for ensuring data is useful in Information Management?

Completeness is essential for ensuring data is useful in Information Management because it refers to the thoroughness of the data collected. Incomplete data can lead to inaccurate conclusions, poor decision-making, and missed opportunities since it may not represent the entirety of the information needed to understand a particular situation or make informed decisions. For information to be valuable, it must capture all necessary aspects of the subject matter, ensuring decision-makers have a comprehensive view of the situation.

While the other options can contribute to effective information management in various ways, they do not specifically address the fundamental requirement for the data itself to be effective. Cost reduction may help in managing resources efficiently, staff competency ensures that the personnel are skilled in working with data, and technology advancement can provide better tools for data management. However, none of these factors can compensate for data that is incomplete, which fundamentally undermines the reliability and applicability of the information being used.