Which aspect is NOT considered when defining the quality of a database?

When evaluating the quality of a database, factors such as data accuracy, data volume, and ease of access are all critical components. Data accuracy ensures that the information within the database is correct and reliable, which is paramount for any research or analytical work. Data volume refers to the amount of data available, which can impact the database's usefulness and relevance. Ease of access relates to how readily users can retrieve and utilize the data, which is significant for ensuring that the information can effectively be employed for intended purposes.

Cost of database development, while important from a project management and budgeting perspective, does not directly pertain to the quality of the database itself. A high-quality database can be achieved regardless of its development costs, and conversely, a low-cost database can still be unreliable or difficult to use. Therefore, the cost is not considered a quality indicator of the database.