The head of the environment is an extension of the head of the village head in assisting or providing services to the community both in the administration of administration in the village and to other problems. It is natural for a kepling to be appreciated for their performance during their special tenure in the kecamatan field area. Previously, the selection of a dipling in a sub-district was very inefficient and seemed unfair for this exemplary selection to use a system to produce an accurate value, and no intentional element. To overcome the process of selecting an exemplary kepling that experiences these obstacles by using an application called a Decision Support System. Decision Support System (SPK) is a system that can solve a problem, and this system is also assisted with several methods, namely the Rank Order Centroid (ROC) method that can assign weight values to each of the criteria based on their priority level. And to do the ranking or determine an exemplary set using the Additive Ratio Assessment (ARAS) method, this method provides decision making that takes decisions based on ranking or the highest value.Keywords: Head of Medan Area Subdistrict, SPK, Centroid Rank Order, Additive Ratio Assessment (ARAS).

The importance of health for everyone to be able to empower everything that is owned and the environment maximally, health is closely related to healthy living. So that can be described the meaning of healthy life is to have health in life with no problems of disruption in life both physical in the form of disease in the body and non-physical that is related to the condition of the soul, heart and mind of a person in life both individually and socially. The use of expert systems with the search model with the Fuzzy Mamdani method can help to know the condition of the disease that may be suffered by each individual based on the pattern of life that he did.

Decision Support System is a system that can help management in making the right decision, which is needed at a management level. Likewise at the Lubuk Pakam Sub-District Office in selecting the best village head. So far, the Camat Office has never determined the best village head in Lubuk Pakam Subdistrict, so that it encounters obstacles in choosing the village head election. SPK is able to provide alternative solutions to semi / unstructured problems for individuals or groups and in a variety of decision making processes and styles, SPK uses data, databases and analyzes of decision models. Seeing this, researchers are interested in conducting research by applying the Extended Promethee II (EXPROM II) method to elect the best village head in a decision support system. It is expected that the results of the research can help the Lubuk Pakam sub-district

Alat berat (beko) atau excavator merupakan alat yang digunakan untuk membantu manusia dalam melakukan pekerjaan pembangunan suatu struktur bangunan. Alat berat (beko) merupakan faktor penting di dalam proyek, terutama proyek-proyek konstruksi maupun pertambangan dan kegiatan lainnya dengan skala yang besar, tapi adakalanya alat seperti ini bisa saja mengalami kerusakan. Kerusakan mesin alat berat (beko) perlu di sistem pakarkan karena tidak semua operator mengetahui atau paham mengenai kerusakan mesin alat berat (beko) atau excavator. Di dalam sistem pakar terdapat metode teorema bayes yang penafsirannya menggunakan dua teorema yang berbeda, teorema ini menjelaskan probabilitas dua kejadian. Atau dapat di artikan teorema ini di gunakan untuk menghitung peluang dalam suatu hipotesa. Dengan demikian alat berat (beko) atau excavator dapat disistem pakarkan menggunakan metode teorema bayes karena dapat menekan biaya operasional agar tidak membengkan dan kegunaan waktu yang efisien.

Desa Lama Health Center is a community health service center for first aid for local communities who want to seek treatment or consult about their health, which serves all public health problems in the fields of childbirth, treatment, outpatient care, hospitalization, baby posyandu and so forth. Decision Supporter. The problems faced by the Old Village Health Center are still using manual methods, especially in determining the recommendation of candidates for Head of the Health Center. On this occasion the authors propose to make decisions for the selection of candidates for the head of the puskesmas using Microsoft Visual Studio 2008. From the results of prospective head centers using the Decision Support System by using the multi attribute utility theory(MAUT) method to facilitate employed in datermining the best decisions in Puskesmas Desa Lama  Sei Lepan.Keywords: SPK Recommendation of Candidate Head of Puskesmas, MAUT