Standards are an agreed way of doing things. They give organizations a set of tools with the potential to help them perform better and compete strongly. Organizations that implement standards wisely can boost profits, cut costs, kick-start growth and reduce the risk of things going wrong. A business may start with ISO 9001 Quality Management System, then add ISO 14001 Environmental Management System and then ISO 50001 Energy Management System. As all the ISO standards have a common structure and requirements, they form an Intergrated Management System, allowing a business to utilise the same processes across multiple standards.
The British Standards Institute (BSI) and the International Standards Institute (ISO) produce, maintain and update the standards. The standard documents themselves are copyrighted to the ISO via BSI in the UK. It is highly recommended for your business to purchase an offical copy of any standard you wish to achieve, such as ISO 50001:2018, directly from the BSI.