BUMDes is a village business institution that is managed by the community and village government in an effort to strengthen the village economy and is formed based on the needs and potential of the village. BUMDes is a pillar of economic activity in the village that functions as a social and commercial institution. In addition, BUMDes also acts as a social institution that favors the interests of the community through its contribution to the provision of social services and commercial institutions that aim to seek profit through their contribution to the provision of social services. This study aims to describe the village drinking water management model and the problems it faces. The research was conducted in the area of Kacaribu Village, Kabanjahe District, Tanah Karo. The problem studied is how the management is viewed from the institutional aspect, water availability, number of users, clean water needs, guidelines governing and financial management. This type of research is a survey with a qualitative and quantitative descriptive approach. The subject of research is the head of the family. The availability of water is very sufficient but customer needs have not been fully met. If the Kacaribu BUMDes can operate effectively and efficiently, the Kacaribu village community will not lack clean water because in one month there is still 13,445 m3, which is equivalent to meeting the needs of clean water on average 259 people/month.

The research aims to analyze productivity, influential factors and the factors that most affect the economic income of robusta coffee farmers farmers in Sempung Polling Village Laeparira District Dairi Provinsi North Sumatra. The location of the study is determined purposively. The method used is the survey method and sample selection is determined by choosing 52 respondents robusta coffee farmers in Sempung Polling Village Laeparira Subdistrict. The results showed that the average production of robusta coffee farmers in Sempung Polling Village of Laeparira District of Dairi Regency amounted to 919.30kg / ha. Simultaneously production, land area, and labor have a real effect simultaneously on the economic income of Robusta coffee farmers. Production, from regression results obtained a calculated value of (-0.597 and Sig. of 0.153. The value t calculates (-0.597) ≤ t table (1.995) then H0 is accepted. This means that production has an unreal effect on farmers' economic income, land area, from regression results obtained by the value of 1,098 and Sig. 0.278 t-count value 1,098 ≤ 1,995 then Ho accepted means the area of robusta coffee plant land has a real effect on farmers' economic income. Labor from regression results obtained a calculated value of -1,230 and Sig. 0.030. The value t calculated (-2,237) < t Table (1,995) then Ho accepted. This means that the amount of labor has no real effect on the economic income of Robusta coffee farmers. Based on the partial survey of labor is the most influential factor on robusta coffee production factor in Sempung Polling Village Laeparira District Dairi District of North Sumatra Province.