Spreadsheet Error Propagation Simulator

 Create an interactive Spreadsheet Error Propagation Simulator that reveals how a single incorrect input or formula can influence an entire workbook. Import supported Excel workbooks, inspect formulas and cell references, construct dependency graphs, and identify downstream outputs affected by selected cells. Let users simulate incorrect assumptions, missing values, rounding changes, and formula modifications without altering the original workbook. Display affected cells, critical calculation paths, potential financial impact, and circular-reference risks. Provide a reviewable correction plan and exportable audit report. Preserve formulas and formatting wherever possible, and clearly distinguish proven dependencies from relationships that cannot be inferred.