Over the last years mega events have gained a higher and more important economical and social position. As an additional point of planning and a relevant tool of urban development and planning, the organisers increasingly focus on these mega events. At the center of attention are in doing so the huge financial and organisatorial expenditures which need to be planned and provided. To avoid negative consequences, a professional supervision and postprocessing of the event is much needed. Through this strategy the factors of the event can be directly influenced. The basic idea of the committee for the Olympic Games in London was to incorporate the site of the Olympic Games into a deprived and underprivileged district, in the hopes to raise the standard of this part of town for the future. The emphasis is on education and promoting ones individual abilities. As long ago as 2004, London began to put their already finished planning into action. The estimated planning period was amounted from 2004 – 2016 and has been considerably shortened up since 2005 because of London being awarded the contract for the Olympic Games of 2012. The economical legacy of the Olympic Games in London 2012 show themselves first of all directly with the organisers. Indicators for a positive effect are the receipts out of broadcasting rights, memorabilia, sponsors and tickets. Long-term receipts can be immediately or at a later date through advertising and licence contracts. An additional revenue can be the the boarding for spectators. Expenses for staff, material goods, funding and possibly infrastructure, as well as taking out necessary insurance can be profit-minimising aspects for organisers. Government grants have been another incentive to host the Olympic Games in London. Since the public authorities often have to grant an aid to the organiser, they often have, among other attributes, here an enormous deficit too. Further negative effects can agree with those of the organisers (after-use, low utilization). Additional receipts through rents, fees and taxes can be gained for the council (Jeanrenaud, 1999; Stettler 2000). From an economic point of view, the visitor of such a mega sport event has to pay the personal expenses for tickets, travelling, accommodation and boarding (Gans, Horn and Zemann, 2003). For the population different positive economical effects occur as well, e.g. private room letting. The creation of quite a number of employment options filled with dedicated staff prior to the Olympic Games and the chances of creating even more jobs are another positive aspect. In comparison to the positive aspects, there can be found negative aspects like noise pollution and a general increase of prices. For catering and hospitality, strengthening effects can be noticed, which aim to approach full capacity during the event. These considerations are the foundation for new capacities to be planned, calculated and carried out. On the other side, these new capacities can lead to an overcapacity which might result in overextension and can end up in the insolvency of an company as a last consequence. Furthermore, the rejection of regular guests can be another negative impact for the later sales planning. It is also possible that regular guests want to avoid the hecticness, crowds of people and temporary narrowness of the area on principle. The local retail industry profits on the one hand from the high attendance and the already mentioned regular guests, and on the other hand there is the possibility of orders from the organisers. These aspects can be transferred in a modified way in due consideration of the different industries onto other entities. A positive ecological effect is the expansion and maintenance of the local transport. The behaviour of the parties concerned with the event have a negative effect. This includes energy use, noise pollution and increased waste (Gans, Horn and