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Apa yang dimaksud dengan Expert System atau dalam bahasa Indonesianya disebut dengan sistem pakar, adalah suatu aplikasi komputer yang memiliki knowledge, experience dan judgmen of skilled proffesionals. Expert system (selanjutnya disebut ES) akan memberi saran- saran keputusan dan kadang-kadang dapat juga memberikan alasan-alasan terhadap rekomendasi yuag diberikannya. Aplikasi ES yang ada saat ini, meliputi mulai aplikasi yang kompleks sampai aplikasi yang relatif sederhana. Di dalam ES, akan digunakan specialized symbolic reasonic untuk menyelesaikan rnasalah yang sulit secara baik. Dengan kata lain ES akan : 1. Menggunakan spesialized knowledge tentang permasalahan secara partikular (seperti geologikal analisis, konfigurasi komputer) daripada pengetahuan calculation. 2. Menggunakan symbolic reasonic daripada numerical calculation 3. Melakukan tindakan dalam tingkatan yang lebih baik daripada non-expert humans. Aplikasi-aplikasi tersebut digunakan oleh pengguna (user) yang tidak expert (non-expert) untuk mendapatkan rekomendasi atau saran-saran tentang permasalahan yang dihadapi. ES juga digunakan oleh para ahli sebagai knowledge assistant. Dan diharapkan, suatu aplikasi ES dapat memberikan fungsi yang lebih baik dari seseorang human expert dalam pemberian keputusan (udgments making) dalam suatu permasalahan yang spesifik.

Organization as a system of behavior included input, process and output. A collection of people, facilities and infrastructure could be used as input for further processing. Form and the process can be the interaction of people involved in the organization. The form of output was a result of cooperation in implementing something to achieved the same goal. The general purpose of operation can not function when not translated into specific objectives. Its not easy to measure achievement objectives for organizations that do not produce tangible outputs such as in the College of Economics Totalwin Semarang engaged in the business of education services. In such organizations, faculty and staff input is a factor that perform a process inorder to create good output. One of the problems still faced by the existing College of Economics Totalwin Semarang until now was "Why do some lecturers work better than other lecturer?" One of the tasks Management College of Economics Totalwin Semarang was to identify the causes of things that could happen. Source of effectiveness of lecturers include motivation, ability, knowledge, skills, attitudes and stress. The differences are influenced by the motivation of work and that can lead to different performance of each faculty. The problem in this study were 1). Work motivation could affect on the performance of lecturers STIE Totalwin Semarang. 2). Which was the factor of work motivation could dominant affected the lecturerperformance in STIE Totalwin Semarang