الفهرس Only 14 pages are availabe for public view
 |  | from | 128 |  |  |
| | | from | 128 | | |
Abstract
In this thesis the cost analysis of some different redundant systems were studied, so we must study the reliability of these systems to obtain some of its different measures such as mean time to system failure, steady-state availability, the probability that the repair man is busy and expected number of visit by repairman. The systems considered may be consisted of similar or dissimilar redundant units. The systems have different types of operations (installation and repair, repair and preventive maintenance and repair only). To compute the cost analysis and graph it we use the Mathematica program.