Microsoft Excel consulting ensures data accuracy and integrity by implementing robust data validation techniques, error-checking formulas, and conditional formatting to identify inconsistencies. They use standardized data entry templates and automate processes to minimize manual input errors. Regular audits and reviews of the data and formulas are conducted to maintain accuracy. Consultants also provide training on best practices for data management and entry. By adhering to these practices, they ensure the data used in analyses and reports is reliable, consistent, and accurate.