Optimization of Glued Laminated Timber Production in Pt Samtraco Cahaya Utama Samarinda by Using Lindo Software

Abstract

This research aims to find out optimal returns from of Glued Laminated Timber products manufactured by PT Samtraco, whose today’s products include Laminating Block, Finger Joins Laminating, Finger Joins Laminating Boards, Solid and Beams. It also aims to find out the output of the combinations of  Glued Laminated Timber  manufacturing models so that the production facilities can be used up.This research was located in Loa Buah Village, Sungai Kunjang Sub-district, East Kalimantan.

The research findings revealed that in Model I the net optimum returns derived from this manufacturing model can be identified after the gross returns was subtracted by the expenditures of each constraint variable, where its gross optimal returns was US$ 1.217.250 with the exchange rate of US$ 1 equalsRp. 9800, therefore, its gross returns was Rp 11.929.050.000. After it was deducted by the expenditures with the amount of Rp 10.676.499.750, then the value of its net returns was 1.252.550.250.

In Model II, the value of optimal net returns can be determined by identifying the gross optimal returns with the amount of US$ 1.240.000 with the exchange rate of US$ 1 equals Rp 9.800, therefore, its gross returns was Rp.12.152.000.000. After it was deducted by the expenditures with the amount of Rp. 10.876.040.000, then the value of its net returns was Rp. 1.275.960.000.

In Model III, the value of net optimal returns derived from this manufacturing model can be determined after the gross returns was deducted by the expenditures of each constraint variable, where its gross optimal returns was US$ 1.294.000 with the exchange rate of US$ 1 equals Rp. 9.800, therefore, the gross returns was Rp. 12.681.200.000. After it was deducted by the expenditures with amount of Rp. 11.286.268.000, then the value of its net returns was Rp. 1.349.932.000.

Based on the value of optimal returns from each model, raw materials dominated the production cost of lamina wood, reaching 57% in the Model 1,59% in  Model 2, and 61% in Model 3, and the subsequent costs including delivery, electricity and labors were below 10% respectively.