Electronic procurement (e-procurement) refers to the use of electronic communication by public sector organisations when buying supplies and services or tendering public works. Increasing the use of e-procurement in Europe can generate significant savings for European taxpayers. Public entities that have already implemented e-procurement report savings of between 5% and 20% of their procurement expenditure. The total size of the EU's procurement market is estimated to be more than 2 trillion euro, so each 5% saved could result in about 100 billion euro of savings per year – which is equivalent to building more than 150 large size hospitals. These savings would maximise the efficiency of public spending in the current context of fiscal constraints.