The Master Thesis deals with main topic of Ivestment plan of company XYZ. The investment plan relates to connection water tanks for selected municipality (villages, cities, etc.) and conclusion of this project. The first part is theoretical and the investment plan of a company as the topic of this master thesis is based on these theoretical information. Analysis, statistics, risk analysis, investment project effectiveness and other research methods are set in the middle part. The last part is conclusion of all mentioned data. The result should establish if the investment plan is suitable for this specific company.