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The evolution of monetary crisis has substantially affect the funding of the private industrial sector. To survive in the present condition and have a fast recovery, it tries to invest in production plant with a limited capital and more especially for the corresponding electrical installations. It tends therefore to maximize the ratio reliability over capital expenditure and availability over capital expenditure. Study of reliability analysis of life time differential and basis, and an economical assessment in line with the idea to eliminate one of the 150 kV overhead line circuits according to the value engineering techniques for Kosambi Baru-Grogol case will prove a real economical advantage and perform an acceptable decrease in reliability and availability and an insignificant increase in operational expenditure. This simple analysis consist to two part data analysis, the first is analysis which is based on data and event idealization (an optimistic analysis), the second is analysis which is based on average data of 150 kV overhead lines. The different view of reliability analysis could probably lead to economical risk calculation due to differential of hazard rate (lambda), availability and life cycle, to expose the quantity of estimated CAPEX saving and compare two systems in terms of annual cost assessment and present value cash flow. The insulator washing policy, hot line maintenance and an operational expenditure differential are discussed to show the impact due to mitigating the dust effect assumption and an additional solution for maintenance scheduled outages.