The purposes of this study were: 1. to study the inventory control system of S. Siriseang Company Limited 2. to study the causes and problems of differences between the real practical work and the company manual 3. to solve the problem of its inventory control system. The questionnaires were collected from 19 subjects relating to the inventory control system including purchasing storingaccounting and sales departments .The results showed that S. Siriseang Company Limited has 4 steps of the inventory control system consisting of Order. Products Return and Pickup. The problems of the inventory control system of S. Siriseang Company Limited are as follows; a lack of inventory data lack of purchasing planning and procurement a defective product categories issues out lack of staff and neglecting to perform the work according to the work manual. The solutions of the problems were 1. sheet items (Stock card) 2. the theory of ABC Analysis 3. the theory EOQ and 4. the process of inventory control system. The effective inventory control system should have the good management system and effective product categories for easy storage and use.

The objectives of this study were to investigate inventory management with logistics systems affecting balanced scorecard (BSC) and to study the balanced scorecard (BSC) affecting organizational sustainability. The population used in this study was under the supervision of the Thai Auto Parts Manufacturers Association. A questionnaire was used as a research instrument for collecting data from accounting executives accounting staff and other related line staff. Data were analyzed using descriptive statistics such as mean standard deviation and percentage and inferential statistics including Pearsons Correlation Coefficient and Multiple Regression Analysis. The major findings indicated that 1) Inventory management with a logistic system positively effected operating results. 2) The performance of the organization had a positive effect on the sustainability of the organization. The study showed that agencies or organizations that rely on inventory storage manage their warehouses better when the logistics system plays a role in managing various systems within the warehouse. Organizations do not have to store excess inventory resulting in liquidity. Reduced Inventory costs also result in lower total costs. The selling price can be set lower than the competitors. Businesses earn more profits which positively affects the balanced scorecard (BSC) in all four organization perspectives. When the balanced scorecard (BSC) continues to improve the organization will grow sustainably.