ABSTRACT

MAHARJONO, ANDHIKO, Trisakti University, March 2011. “ Chosing the right lot sizing methods (Economic Order Quantity, Periodic Order Quantity and Fixed Order Quantity) to achieve the optimum inventory turnover, case study in PT. Duta Kalingga Pratama”.

Major Advisor : Prof. Dr. Syamsir Abduh

The background of this research was the procurement of material based on the right quality, time, quantity, place and price will determine the success of manufacturing industry to face all possibilities in the future as follow : unconstantly demand and the rising price in future. The huge availability of product compared to customer demand will add maintaining and storage cost, inventory capital, and also decreasing in quantity and quality of product for certain time.

On the contrary, the small availability of product will affect production stagnation causing late fulfilling the demand of customer. It will make the company will get loss the customer trust.

The objective of this research as follow : 1) to know whether there is difference between Economic Order Quantity (EOQ), Periodic Order Quantity (POQ) and Fixed Order Quantity (FOQ) in resulting the inventory turnover of ribbon. 2) to know the right lot sizing method used in PT. Duta Kalingga Pratama in order to achieve optimum inventory turnover of ribbon.

3) to know whether there is difference between Economic Order Quantity (EOQ), Periodic Order Quantity (POQ) and Fixed Order Quantity (FOQ) in resulting the inventory turnover of scanner. 4) to know the right lot sizing method used in PT. Duta Kalingga Pratama in order to achieve optimum inventory turnover of scanner.

The design of this research applies normality test with Kolmogorov Smirnov and then comparative test with Kruskal-Wallis test to find out whether there is difference between Economic Order Quantity, Periodic Order Quantity, and Fixed Order Quantity. Then applies