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Penerapan six sigma - DMAIC untuk mengurangi jumlah produk cacat bobbin cap : studi kasus di CV Sama Jaya
CV. Sama Jaya is a manufacturing company that produces products of
industrial machinery spare parts-based plastics. At the company, product quality
is matter that requires special attention.
One of the products produced by CV. Sama Jaya is Bobbin Cap that
widely used in textile industry. The number of the defective products on the
company is still quite high. Defects that occurs are an imperfect form of the
product, the size ·of the product is not same with the specification,colour of
the product is not even, and spots on the product
Six Sigma - DMAIC is a quality control methods developed by the
Motorola Company. The purpose of the use of this method is the achievement of
the production process with zero defect. Based on measurements
of DPMO before repair, it is known that the average at DPMO is 16677,966 and
an average of Sigma level is 3,653.
Causes of the defective products are lack of warmup time for the
machine, heating element that never changed, quality of raw materials is not
good, the mold position doesn't fit, the operator doesn't have enough knowledge
about the machine that handled. Repairs that have done are check sheet
design, visual display design, raw material inspection upon receipt, giving more
warmup time, rotation of workers between stations, and procurement training.
After the repairs done, then the value of the average of DPMO reduced to
5794,702 and the average of Sigma Level increased to 4,024. Through the test
proportion is known that after the application of the methods of Six Sigma
DMAIC, the· proportion of defective products reduced.
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