Why can a data mart be constructed more rapidly than a data warehouse?

A data mart can be constructed more rapidly than a data warehouse primarily because it typically focuses on a single subject area. This narrow scope allows for quicker design, development, and deployment since the project can concentrate on delivering specific data needs rather than accommodating a wide array of data from multiple sources, as is common with a data warehouse.

By focusing on a singular subject area, organizations can streamline the process of data extraction, transformation, and loading (ETL). They face fewer challenges in integrating diverse data sets, which not only accelerates construction but also simplifies ongoing maintenance and updates. The targeted approach aligns better with the needs of specific business units or departments, encouraging faster user adoption and reducing the complexity involved in managing a larger, more comprehensive data repository.

In contrast, factors listed in other choices do not inherently contribute to the construction speed of a data mart. Historical information does not directly impact the speed of development; using a web interface is a method of access rather than a construction characteristic; and while being company-specific could simplify some aspects, it does not inherently lead to a quicker build compared to focusing on a defined subject area.