Inventory, being the most exposed asset in conventional accounting system, pose a great deal of threat to accountants, financial supervisors and stock controllers. Interesting to know; it is the most uncontrollable entity on the part of supply chain experts. The two great challenges popping up again and again are ‘How Much’ and ‘When’? Despite the fact, we all know that the possibility of reaching up to a target of point estimate in forecasting is essentially zero, still we dare to answer aforementioned two questions repeatedly.