| Summary: | 碩士 === 國立交通大學 === 工業工程研究所 === 83 === In order to cope with the fast changing market demand , to
raised production efficiency , and to amintain the
competitive advantage, the concept of cellular manufacturing(
CM) becomes one of the most important industerial
applications and research directions . The basic idea of
CM is a subdivide a large manufacturing system into
several small manufacturing cells through the practice of
group technology(GT) concept. no matter how sophisticated cell
formation technique is employed in the cellularization process,
there inevitably exist inter-cell parts which may again
complicate the simplified system. The proper management of
these inter-cell parts to reduce potential system disturbances
is necessary. In the past two decades , several
approaches such as alternative design, alternative process
plan, duplicate machine, or subcontracting , to eliminate
inter-cell parts have been proposed by many well known
researchers . However, when the above methods cannot be
applied due to economical or technological infeasibility
, the inter-cell parts need to be well scheduled in the
cellular manufacturing system. Tn fact, shared machines and
inter-cell parts exit in most real-world cellular
manufacturing system.[Pullen 1976, Wemmerolv and Hyer 1989]
Most traditional GT scheduling models assume simplified CM
environment without inter-cell parts considered . This
research proposes a two phase GT scheduling method by
taking inter-cell parts into consideration. This method
determine the ultimate job sequence under objectives of
minimation of 'average tardiness' and 'percentage of job
tardy', respectively. Among eight combinations of
dispatching rules, EDD/DDFAM and SI/DDFAM out performed others
in most cases.
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