Outsourcing is a very popular method of lower organisation’s costs. Businesses from this area are specialized in one model of activity and they are searching business partners who want their services. Nowadays we have many different outsourcing firms. There are IT outsourcing firms, which secure other firm’s data, accounting outsourcing, maintenance outsourcing and many others. Large firms are pleased that they may hire these kind of business partners, for railway firms or air transport organisations maintenance outsourcing can be a blessing.