Quality control on the production of medium density fiberboard (MDF)

SUMMARY Quality Control on the Production of Medium Density Fiberboard (MDF) Most of the statistical process control (SPC) techniques are developed for the assumption that considers the measured data to be normally and independently distributed. In real world applications of SPC, however, this assumption is very far from the truth due to the dependence of data on itself. However, quick effective and minimum cost of product inspection can be done by statistical quality control. In this study; it was aimed to obtain curves of X control graphics, one grade acceptance sampling plan, operating characteristics, average outgoing quality and averaging total inspection number. Results such as thickness, density, modulus of elasticity, internal bonding 24 hours submerged in water and thickness swelling of Medium Density Fiberboard (18mm) from SFC and Divapan organization were used for obtaining the curves. Four different methods were investigated in order to determine operating characteristics curves. It was designed the results and curves by Poisson dispersion. It was observed that all process and product SFC and Divapan in organization are under the control according to X control graphics and characteristics curves. Keywords: Forest Products Industry, Medium Density Fiberboard, Statistical Quality Control, X Control Graphic, Operating Characteristic Curve vn