PENERAPAN STATISTICAL QUALITY CONTROL (SQC) PADA PENGOLAHAN KOPI ROBUSTA CARA SEMI BASAH
Abstract: PT. J.A. Wattie is
local plantation which process robusta coffee in Jember. The main problem of
Indonesian coffee is quality, which can not fulfill the requirement of
international market quality. The several factors that influence coffee quality
are harvest, sanitation, productionprocesses, place and equipment. Statistical
quality control is method to control production process stability, where PT.
J.A. Wattie did not apply in coffee productionprocess. The objectives of this
research are identify quality output at each stage of processes; observe the
correlation of production process and coffee quality based on statistical
quality control.Grading and hulling processes according to control chart showed
that the process was under control because data plot to be present in interval
upper and lower control limit. Pulping and washing processes were out of
control because some data plot to be present in outside of upper control limit
or lower control limit.Washing process showed other pattern because more than
four (4) data make increasing or decreasing pattern. Increasing or decreasing
patterns can be indicator of abnormality processes. Abnormality of washing and
pulping processes were resulted from the pulper and washer. The rare maintance
of pulper and washer can be factor that makes abnormality process.
Penulis: Andrew Setiawan
Rusdianto, Noer Novijanto, Rosy Alihsany
Kode Jurnal: jppertaniandd110224