tool that does the cutting or shaping. All machine tools use some means of constraining the workpiece and provide a guided movement of the parts of the machine. Thus the relative movement between the workpiece and the cutting tool is controlled or constrained by the machine to at least some extent, rather than being entirely "offhand" or "freehand". Cutting tools Professional management of the inventory of cutting tools occurs mainly in larger operations. Smaller machine shops may have a more limited assortment of endmills, keyseat cutters, inserts, and other cutting tools. The choice in the sophistication of the design of the cutting tool, including material and finish, commonly depends on the job and the price of the cutting tool. In some instances, the cost of custom-made tools could be prohibitive for a small shop. Depending on the industry and demands of the job, a cutting tool may only be used on a certain type of material, that is, a cutting tool may not contact another workpiece made of different chemical composition. Not all machine shops are equipped with a mill and not all machine shops are aimed to do milling work. Housekeeping Some machine shops are better organized than others, and some places are kept cleaner than other establishments. In some instances, the shop is swept minutes before the end of every shift, and in other cases, there’s no schedule or routine, or the cycle for sweeping and cleaning is more relaxed. When it comes to machines, in some places the care and maintenance of the equipment are paramount, and the swarf (commonly known as chips) produced after parts have been machined, are removed daily, and then the machine is air-blown and wiped clean; while in other machine shops, the chips are left in the machines until is an absolute necessity to remove them; the second instance is not advisable. Recycling The remanent or residue of materials used, such as aluminum, steel, and oil, among others, can be gathered and recycled, and commonly, it may be sold. However, not all machine shops practice recycling, and not all have personnel dedicated to enforcing the habit of separating and keeping materials separated. In larger and organized operations, such responsibility may be delegated to the Health, Safety, Environment, and Quality (HSEQ) department. Inspection See :Category:Metalworking measuring instruments Quality assurance, quality control and inspection, are terms commonly used interchangeably. The accuracy and precision to