GRAFIK PENGENDALI INDIVIDUAL BERBASIS DISTRIBUSI WEIBULL 2-PARAMETER (Studi kasus : Elongation Benang 30 TR 1004 Cone Produksi PT. Pisma Putra Textile Pekalongan); (THE INDIVIDUAL CONTROL CHART BASED ON 2-PARAMETER WEIBULL DISTRIBUTION) (Case Study : Elongation of Yarn 30 TR 1004 Cone Producted by PT. Pisma Putra Textile Pekalongan)

Safitri, Helmi, Gunardi

2015 | Skripsi | FMIPA UGM

Individual control chart is a tool used to control a production process using a single sample. The commonly used assumption to make individual control chart is normality assumption, but on the reality not all the obtained data has normal distribution. In order to solve that, there are a few alternatives way, one of them is by making individual control chart using distribution patterns of the data. One of the distribution which can be used to make individual control chart is Weibull distribution. The Weibull distribution that used on this thesis is 2- parameter Weibull distribution (Weibull 2-P). The controlling boundaries got by using 2 parameters of the weibull distribution itself. The data that used on the study case is the Elongation data from yarn 30 TR 1004 Cone which product of PT. Pisma Putra Textile Pekalongan. Based on the study case, the result of controlling chart by using Weibull distribution pattern with 2 parameters has higher sensitivity level than controlling chart made using normal distribution data.

Kata Kunci : individual chart control; Weibull 2-P; Elongation