Abstract
Reliable electric energy is one of the most important necessities for customers and there are high correlation between customer based reliability indices and customer satisfaction. Electric power interruptions have not only economics problems but also it makes social and mental difficulties. However customers’ sensitive is different against interruption. Culture and living stiles of customers have significant effects on their satisfaction from utilities. For consideration of customer view point against interruptions, it seems that Customer Dissatisfaction Index (CDI) should define and enter as a reliability index. Based on this index, reliability enhancement strategies can be planned for maximizing customer satisfaction index. In this paper for assessing customer dissatisfaction index, questionnaires are designed. As case study these questionnaires have been filled by domestic customers in Rasht, a big and costal city in north of Iran. Gathered data has entered in SPSS software and customers’ reply stochastic indices have obtained and analyzed. According to results, sharp threshold values for customer satisfied regarding reliability of supply were found. Results show customers’ sensitive for number and duration of outages and transient fault depends on time a day or seasons, in this paper time based Customer Dissatisfaction Index has been analyzed.
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