Outsourcing is a common method of lower firm’s costs. Firms from this branch are specialized in one model of activity and they are searching business partners who want their services. Nowadays we have got a lot of different outsourcing firms. There are IT outsourcing businesses, which protect other firm’s data, outsourcing connected with accounting, maintenance outsourcing and many many others. Large companies are satisfied that they can hire these sort of specialists, for railway firms or air transport organisations maintenance outsourcing can be a blessing.