The Purchasing Managers’ Indexes (PMI) are economic indicators that are derived from the surveys of private sector companies that happen monthly. There are two chief producers of this index – the Institute for Supply Management (ISM) and the Markit Group. The ISM started the manufacturing and non-manufacturing metrics in the USA. The Markit Group supplies metrics based on the work of the ISM to more than 30 countries in the world.
The Markit Group and the ISM furnish separately the PMI every month by conducting polls in businesses that belong to the particular sector. ISM’s surveys include coverage of all NAICS categories while the Markit Group covers only private companies.