This document analyzes working capital management in the National Aluminium Company (NALCO) over a 15-year period from 1995-1996 to 2009-2010. It aims to evaluate NALCO's management of cash, receivables, inventory, and the impact of working capital management on profitability. The author hypothesizes that cash balances affect operating expenses, provisioning for doubtful debts impacts receivables, inventory levels influence sales, and working capital management impacts profits. Statistical analysis is conducted to test these hypotheses using NALCO's annual reports and secondary data sources.