Process Monitoring of Dakwah and Politics Magazine with Multivariate P Control Chart and Univariate P Control Chart
Surya Puspita Sari (*), Mega Silfiani

Institut Teknologi Kalimantan
*surya.puspita[at]lecturer.itk.ac.id

Abstract

Language is a tool to express an opinion or statement to be conveyed to others. There are two types of language in the media, namely spoken language, and written language. One work that uses written language as a medium of communication is a magazine. To write a magazine, it must comply with the rules of language. But often the writing in a magazine still error. The types of errors that often occur are grammar errors, language errors, punctuation errors, and typing errors. This study aims to determine whether the types of errors that have been mentioned in the magazine manufacturing process have been statistically controlled and to analyze the factors that affect the level of defects in the magazine manufacturing process. Quality control using a univariate P control chart, showing each type of error that occurs produces a graph containing out-of-control data. However, when quality control uses a multivariate P control chart, the resulting graph does not contain out-of-control data. Further identification was carried out with a Pareto control chart to determine the frequency of the type of defect that is more dominant. Meanwhile, to find out the factors that influence the instability of the magazine-making process, namely machine, method, human and environmental factors, a causal diagram is used.

Keywords: Types of defects, univariate P control chart, multivariate P control chart, Pareto chart, Cause and effect chart

Topic: MATHEMATICS AND STATISTICS