There are some shortcomings of using external data for decision making purposes such as;

• The necessary data may not be available, or it may need some transformations. ?
• The integration with existing company data sources or information systems may be problematic. ?
• Importing data can be time-consuming.?
• It may be hard to ensure data compatibility.
• It may require manual work-flow and data
• processing.?
• It may be difficult to validate data formats.