• **Product control:**

Product refers to the physical output produced by supplying in the inputs or raw materials and carrying out any production process. The final product is what is dispatched to the customer or the end users. Apart from this, there are components sometimes referred to as intermittent products. For a leather garment manufacturer, these are prepared sleeves, pockets, collars, etc. Therefore, the output after each operation or process is an intermediate product. Product control generally refers to the control of the final product. Control of intermediate products is equally essential. This is due to the fact that in each stage the product quality is ensured so as to produce the final product of desired quality [6].
