الفهرس 
ARABIC SUMMARY
Assembly processOnly 14 pages are availabe for public view
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Abstract
Assembly lines are lines in which a variety of components are assembled to larger and larger subassemblies until a single final product is achieved.
The major problem with automatic assembly lines is how to guarantrr a high and regular avaliability over the longest possible period. Nowadays, modern products have a large number of components increasing the complexity of assembly process. This complexity increases the probability of failure of the individual workstations and the whole assembly line. Therefore, the attention during design of assembly workstations is not limited to their function only but also to their availability.
Improvement in the production rate of an automatic assembly line can be achieved by first locating any faulty workstation, and then isolating its effect from the other functioning workstations. This objective can be verified if each workstation is kept always working except during failure. If this assumption is satisfied, the workstation will perform its task with no force down no input (workstation is physically able to assemble, but unable to assemble because it has no available component) or no force down full out put (workstation is physically able to assemble, but it cannot assemble because the sub-assembled workpiece cannot be transferred to the nextworkstation).