The aims of this study are (1) the adapting of women’s wear in holding inventory to a new product (2) the study of the satisfactions of women who are 25-35 years old in Bangkok about the adapted women’s wear in holding inventory. The tools for study are the questionnaires and the prototypes to accidental survey 302 women who are 25-35 years old in Bangkok and being the members from buying products of Boutique Newcity Public Co. Ltd. The fist of methods sketching of the adapted holding inventories (shirts skirts and pants) with Ruffles Godets and Transfer Printing to selection by the 5 specialists. Then adapting the top 5 selected styles. Finally surveying and analysis of the samples with percentage mean and standard deviation. The result of the study shows that most women from the sampling are single and have education in Bachelor Degree. Their occupations are in private sector with salary range between 10000 –20000 bath. Their favourite shopping place of women’s wear is department stores and buying of top 3 are pants dress and blouse. The first reason for them to buy the products is the interesting design. The overview of adapted products shows skirts are the first favourite with mean value of 3.13. Shirts are the second favourite with mean value of 3.09 and pants are the last favourite with mean value of 3.07. The conclusion of the developed women’s wear are favoured medium level.

The objectives of this research were to select the most appropriate forecasting model for uncertain demand of hot-rolled steel and to find the purchase amount and the reorder point of some raw materials in order to minimize the total cost of production in an iron and steel production planning. The three forecasting models which were exponential model ARIMS model and the proposed Bayesian model were studied. An iron and steel factory in Samutprakarn province was a prototype for this study. Because of their uncertain high demand the Steel H-Beam Steel plate steel round bar and black steel round bar with various sizes were selected and their parameters including demand rate inventory cost back order cost and setup cost were collected. The study found that the proposed Bayesian forecasting model is the most appropriate. The predicted demand and all parameter values were used to find the purchase amounts and the reorder points of the raw materials under the (rQ) policy of the stochastic inventory model.

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 inventory is being counted as an important circulatory asset because of its highly investment. Moreover other assets investment can not be done to make any profits without selling the inventory out. If any businesses have got too many inventories the investment will be embedded in these assets resulting in too much spending on storing taking risk of losing damaging being out of date and lacking of the circulation of the assets. On the contrary if too little amount of inventories are stored there will be too many times for ordering goods. Cost of order will also be high and lose of selling opportunity because they dont cope with the customers need. If the business lacks of an effective inventory management many problems will affect the business operations such us lacking of money circulation lacking of profiency etc. That leads to the lose of investment and the damage of businesses. The study of liThe Executives Opinions Towards the Inventory Management of the Enterprises in Bangkok was to : (1) study the executives opinions towards the inventory management of the enterprises in Bangkok; ( 2) find the guideline to develop the inventory management more efficiently ; and(3) compare the executives opinions and their guideline to develop the inventory management of the merchandising enterprises and the manufacturing enterprises in Bangkok. The population used in this study was the merchandising enterprises and the manufacturing enterprises in Bangkok which these data were collected from the Ministry of Commerce. About 400 staff from 2 types of the mentioned enterprises were accidentally sampled. The questionnaires and the interviewing form were used as the tool to collect the data. The data were analyzed as mean standard deviation and t -test independent samples. The findings were as follows: (1) The executives from the enterprises thought that business sectors should plan and control the inventory efficiently to control the inventory to be at the appropriate level not too high or not too low and they should predict customers need precisely as well as being able to specify the best quantity of order and the best location of stock order. The total expenses of the inventory should be controlled at the lowest rate which the inventory มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร .. circulation was in higher rate and could solve problems of the out of date and the damaged assets problems resulting in cost decrease and good assets circulation. (2) The executives suggested that the guidelines in development of the inventory was that new advanced technology and the information technology should be presented in business operating to cope with the continuously assets movement. the enterprises could fix quantity of order nearly as the business sectors demand in various period of time which caused higher assets circulation less inventory less investment and the least cost. This will lead to less price setting and gave more advantage in business competition. (3) The comparison of the executives opinions and their guideline to develop merchandising enterprises and the manufacturing enterprises in Bangkok showed that the executives from both sectors had the same opinions. Suggestions : small business sectors should apply the executives experiences to make a plan predict customer need find the quantity of order by using the previous statistic data and the customers request as their criteria. The computerized bar-code has not yet been used to order and purchase the assets in the inventory since it needs high cost investment and non-controlled inventory expenditure which lead to decrease cost of investment.

Genetic algorithms are applied to the multiple products and multiple periods inventory lot-sizing problem with supplier selection under storage capacity. The objective of this research is to calculate the optimal inventory lot-sizing for each supplier and minimize the total inventory cost which includes joint purchase cost of the products transaction cost for the suppliers and holding cost for remaining inventory. It is assumed that demand of multiple products is known over a planning horizon. The problem is formulated as a mixed integer programming and is solved with genetic algorithms. Finally numerical example is provided to illustrate the solution procedure. The results determine what products to order in what quantities with which suppliers in which periods.