Any business or industry for that matter should have some kind of measurement and metrics to find out what has been happening, how they have been performing and also evaluate their progress , if here has been any or take remedial measures if not. That is why we need some scales to have the metrics and measurements. For example, you might want to use scales for measuring the height of the employees if you are recruiting for a basketball coach , or you might want to weight the jewellery if you are into jewellery business and so on.