Study On The Improvement Of Crack Quality Problem Of D Tablet

QI(Quality Improvement), as a part of QC(Quality Control),aims to strengthen the abilityof meeting the QR(quality requirements). It is known to all that the level of product quality isvital to the satisfaction of clients as well as the profit of a company. In a bid to improve thequality of products, it is necessary to take measures to solve the quality problems so that theproduct quality can be improved to a higher level.This essay will take D film-coated tabletof A company as a study target based on thetheory of QI and a method of PDCA. With the help of QI tools，working out the Qualityimprovement measures in order to improve its Production Pass Rate as well as to lower theproduction cost.First, to identify the main quality defects: cracks, by pareto diagram analysis of thecollected manufacturing data and production status and the existing quality problems, find outthe possible factors that may contribute to the quality defects by cause-and-effectdiagram.Then, propose the improvement measures of the main factors respectively on thebasis of PFMEA and to analyze the related measuring system.After that, find out the optimal combination of granulating ratio and coating parameterby the method of experiment design，and implement improvement measures.Finally, to verifythe results of the improvement measures and update the production process and the relevantdocuments of production operations, and a series of suggestions were made on the personnelmanagement and quality control system of company A，and carried out economic analysis onits improvement measures.The improvement outcomes and economic analysis results showedthat the D product quality improvement activity has improved the qualification rate of Dproduct in the tablet compressing and coating processes,especially the qualification rate of thecoating process.Besides,about1.8million yuan of labor costs and7.5million yuan ofproduction costs could be saved annually,and production efficiency was increased. Moreover,it shortened product production cycle and decreased production cost.