การเลือกวัตถุดิบและการจัดสรรการผลิตสำหรับกระดาษบรรจุภัณฑ์

Abstract

Abstract

The purpose of this paper is to propose a mathematical model to allocate resources for card board demand and select proper material for each product type to satisfy product specification at the minimum cost.  Since raw material price and customer demand are various, the “Winter’s Linear and Seasonal Exponential Smoothing forecast” method is used to forcast 11 types of product demand.  It results in the average MAPE of 0.91%.  The 14 tpes of raw material prices are forecasted by “Exponential Smoothing” and “Trend-adjusted Exponential Smoothing” method.  The average MAPE are 2.51% and 2.33%, respectively.  The forecasted results are used as inputs in the mathematical model to obtain the raw material purchasing plan and resource allocation plan.  It can be concluded that, the profit increases 14.36% compared to the actual situation.