 What is production process? Production process is a workpiece and involves transforming a raw material from its origin state to a finished state by changing its shape or the properties of the material in a series of steps. It is generally classified into six groups. The first being primary shaping process which is a production of solid body from a molten state, Asia state or amorphous materials like glass, poured into a hollow space of desired shape, examples include casting and powder metallurgy. Second comes deforming processes which makes use of stresses like tension, compression etc. to deform a material in cold or hot condition without changing its mass or metal composition. Some of them are forging, rolling, sheet metal working and excruciating. Third is machining processes in which the material is removed by providing suitable relative motion between the workpiece and tool to generate the required size and shape on the component. Examples are drilling, milling, turning etc. Fourth group is joining processes. Here two or more pieces of metal parts are joined together to make a final component using heat and or pressure. Examples include welding, soldering, brazing, screwing, adhesive bonding etc. Fifth and the last second group is surface finishing processes in which only negligible amount of metal is removed from the workpiece to provide a good finish or protective coating. Examples are grinding. Sixth and the last group is material properties modification process which are the processes that provide certain specific properties to metal parts so as to make them suitable for particular operations. Examples include hot and cold working.