Pengendalian Kualitas Statistik Produk Pupuk Phonska Di PT Petrokimia Gresilk Tbk

Mufidah, Alifa Silfi (2014) Pengendalian Kualitas Statistik Produk Pupuk Phonska Di PT Petrokimia Gresilk Tbk. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Peningkatan kualitas produk merupakan salah satu kunci dalam strategi persaingan bidang industri untuk mempertahankan kredibilitas dan keunggulan suatu perusahaan. PT Petrokimia Gresik merupakan produsen pupuk dimana kualitas produksi pupuk mendapatkan perhatian utama. Pada proses produksi pupuk, komposisi merupakan hal krusial dimana apabila tidak sesuai dengan spesifikasi yang tepat dapat mengakibatkan pertumbuhan tanaman menjadi tidak normal sehingga menurunkan hasil panen petani atau bahkan terjadi gagal panen. Berdasarkan pertimbangan tersebut maka Tugas Akhir ini berfokus melakukan penelitian kualitas pupuk yakni pada inspeksi komposisi. Objek penelitian dalam Tugas Akhir ini adalah karakteristik kualitas pupuk phonska, antara lain komposisi H2O, N, P2O5, dan K2O. Metode yang digunakan dalam penelitian Tugas Akhir ini adalah peta kendali Generalized Variance dan T2 Hotteling. Pada peta kendali Generalized Variance fase 1, nilai covarian matriks yang digunakan yakni dari nilai covarian matriks Successive Difference. Pada analisis selanjutnya yakni peta kendali Generalized Variance fase 2, T2 Hotelling fase 1, dan T2 Hotelling fase 2 menggunakan nilai covarian matriks dari data Generalized Variance fase 1 yang telah terkendali sebagai tolok ukur. Pengendalian kualitas pada peta kendali dilakukan dengan menghilangkan data pengamatan yang out of control, hingga didapati peta kendali telah terkendali dalam variabilitas maupun mean proses. ========== Improving the quality of products is one of the key industries in the field of competitive strategy to maintain credibility and excellence of a company. PT Petrokimia Gresik is fertilizer producer where fertilizer production quality getting major attention. In the fertilizer production process, the composition is crucial if it is not according to the exact specifications can result in abnormal plant growth resulting in lower crop farmer or even crop failure. Based on these considerations, the final project is conducting research focuses on the quality of the fertilizer composition inspection. The object of research in this final project is Phonska fertilizer quality characteristics, such as composition H2O, N, P2O5 and K2O. The method used in this final study is Generalized Variance control chart and T2 Hotteling control chart. In the control chart of Generalized Variance phase 1, the covariance matrix value useSuccessive Difference. In the subsequent analysis of the control chart Generalized Variance phase 2, T2 Hotteling phase 1, and T2 Hotteling phase 2 use covariance matrix value of Generalized Variance phase 1 data which has been restrained as benchmarks. Quality control in the control map is done by removing the observational data that is out of control, until the control chart has been found in a controlled process variability and mean.

Item Type: Thesis (Diploma)
Additional Information: RSSt 519.86 Muf p
Uncontrolled Keywords: Successive Difference, covarian matriks, peta kendali, Generalized Variance, T2 Hotteling, , H2O, N, P2O5, dan K2O, Successive Difference, covariance matrix, control map, Generalized Variance, T2 Hotteling
Subjects: T Technology > TS Manufactures > TS156 Quality Control. QFD
Divisions: Faculty of Mathematics and Science > Statistics > (D3) Diploma
Depositing User: - Davi Wah
Date Deposited: 05 Jul 2019 04:32
Last Modified: 05 Jul 2019 04:35
URI: http://repository.its.ac.id/id/eprint/63282

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