Analisis Distorsi Informasi Dan Bullwhip Effect Pada Supply Chain

Soewartini, Sudarmo (2007) Analisis Distorsi Informasi Dan Bullwhip Effect Pada Supply Chain. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PT Sinar Sosro Pabrik Gresik merupakan perusahaan industri minuman ringan yang memproduksi produk Fruit Tea Genggam. Ketidakstabilan permintaan produk mengakibatkan terjadinya bullwhip effect. Perusahaan harus dapat membuat biaya rendah dengan service level tinggi. Fokus penelitian ini adalah melakukan pengukuran besarnya bullwhip effect, mengidentifikasi faktor-faktor penyebab bullwhip effect, dan memberikan usulan solusi agar bullwhip effect menjadi berkurang. Agregasi data dilakukan berdasarkan produk/Kantor Penjualan (Φ1), produk (Φ2), Kantor Penjualan (Φ3), dan Echelon (Φ4). Bullwhip effect diukur berdasarkan perbandingan antara koefisien variasi permintaan yang keluar dari suatu channel (Cout) dengan koefisien variasi permintaan yang diterima oleh channel (Cin). Analisis regresi digunakan untuk mencari variabel-variabel yang memberikan kontribusi terhadap bullwhip effect. Pengukuran bullwhip effect dilakukan berdasarkan jenis produk (9 varian rasa) dan berdasarkan jenis kemasan (kemasan 1 rasa dan kemasan 3 rasa). Pengukuran bullwhip effect berdasarkan produk menghasilkan nilai Φ1 = 0,62, Φ2 di upstream = 1,00 dan di downstream = 1,44, Φ3 = 0,63, dan Φ4 di upstream = 1,08 serta di downstream = 1,01. Pengukuran bullwhip effect berdasarkan kemasan menghasilkan nilai Φ1 = 0,66, Φ2 di upstream = 0,99 dan di downstream = 1,41, Φ3 = 0,79, dan Φ4 di upstream = 0,96 serta di downstream = 1,08. Hasil penelitian menunjukkan bahwa bullwhip effect yang terjadi pada supply chain perusahaan disebabkan oleh distorsi informasi dari downstream ke upstream. Dari hasil perhitungan dan analisis untuk periode Januari 2006–Desember 2006, apabila terjadi pengurangan bullwhip effect, maka diperoleh penghematan biaya persediaan sebesar Rp1.703.526.050,00 dan peningkatan service level dari rata-rata 92,68% menjadi 100%, sehingga keuntungan akan meningkat karena tidak terjadi stockout cost sebesar Rp1.369.773.500,00.
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PT Sinar Sosro Pabrik Gresik is a soft-drink manufacturing company producing Fruit Tea Genggam. Product demand instability induces the bullwhip effect. The company must be able to achieve low costs while maintaining a high service level. This research focuses on measuring the extent of the bullwhip effect, identifying the factors causing the bullwhip effect, and proposing solutions to reduce it. Data aggregation is conducted based on product/sales office (Φ1), product (Φ2), sales office (Φ3), and echelon (Φ4). The bullwhip effect is measured based on the comparison between the coefficient of variation of demand released by a channel (Cout) and the coefficient of variation of demand received by the channel (Cin). Regression analysis is used to identify variables that contribute to the bullwhip effect. The bullwhip effect is measured based on product types (9 taste variants) and packaging types (1-taste packaging and 3-taste packaging). The bullwhip effect measurement based on products resulted in values of Φ1 = 0.62, Φ2 upstream = 1.00 and downstream = 1.44, Φ3 = 0.63, and Φ4 upstream = 1.08 and downstream = 1.01. The bullwhip effect measurement based on packaging resulted in values of Φ1 = 0.66, Φ2 upstream = 0.99 and downstream = 1.41, Φ3 = 0.79, and Φ4 upstream = 0.96 and downstream = 1.08. The results showed that the bullwhip effect occurring in the company's supply chain is caused by information distortion from downstream to upstream. Based on calculations and analysis for the period from January 2006 to December 2006, reducing the bullwhip effect would result in inventory cost savings of Rp1,703,526,050.00 and an increase in the service level from an average of 92.68% to 100%, thereby increasing profits by eliminating stockout costs of Rp1,369,773,500.00.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	bullwhip effect, distorsi informasi , supply chain, studi kasus, bullwhip effect, information distortion, supply chain, case studY
Subjects:	H Social Sciences > HD Industries. Land use. Labor > HD38.5 Business logistics--Cost effectiveness. Supply chain management. ERP
Divisions:	Faculty of Business and Management Technology > Management Technology > 61101-(S2) Master Thesis
Depositing User:	magang .
Date Deposited:	16 Sep 2026 02:30
Last Modified:	16 Sep 2026 02:30
URI:	http://repository.its.ac.id/id/eprint/144522

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