This research aims to increasing efficiency in production and eliminate the problem of insufficient production capacity with respect to customer demand for electrical appliance factory by applying the line balancing method. Thus the study then developed two problem-solving approaches. The first approach is a method by which a firm applies the line balancing concept and ECRS technique (Eliminate Combine Rearrange and Simplify). On the contrary the second approach is required an investment in testing machine with value of 1000000 baht in order to support sufficient production capacity to meet customer demand. Also ECRS method is used to accomplish this process. Based on the results the first approach provided the production line efficiency improvement representing of 82.59% and reduced the labor cost of 277220 baht per year. However the loss of commercial opportunity has remained the same of 6336000 baht per year. Accordingly the second approach demonstrated of 92.11% of the production line efficiency improvement and the labor cost reduction valued of 277220 baht per year. As we expected the second approach satisfied production efficiency by eliminating the loss of commercial opportunity with value of 6336000 baht per year delivering a return of investment within two months.

The purpose of this study was to optimize the bioethanol production from cassava pulp and cassava wastewater. The study was divided into two phase: 1.) Pretreatment and enzymatic hydrolysis 2.) Bioethanol fermentation. The effect of substrate and ratio of loading 1 3 5 and 7% (w/v) with the mixed enzyme α-amylase and glucoamylase ratio of 1:1 (v/v).The results showed that at 7% substrate loading the highest reducing sugar concentration was 89.55±1.13 g/L. Regarding the best ratio of α-amylase and glucoamylase at 1:1 (v/v) with fermentation time of 4 h gave the highest yield of 0.58±0.02 (g product/g substrate). In addition the highest glucose yield of 0.36±0.04 (g product/g substrate) was observed in 2 h fermentation time after hydrolysis with α-amylase and glucoamylase using cellulase and xylanase ratio of 1:1 (v/v). The results indicated that usage of mixed enzyme proved to spend shorter hydrolysis time and enhance the fermentable sugar production from cassava waste. The enzymatic hydrolysate was used as substrate for bioethanol fermentation using S.cerevisiaeTISTR5339. The results showed that the ethanol yield at fermentation time at 6 h with S.cerevisiae5 10 20 and 30% (v/v) were 0.27±0.027 0.23±0.002 0.19±0.022 and 0.16±0.011 (g ethanol/g substrate) respectively. The result indicated that ethanol yield decreased with increasing cell concentration of S.cerevisiaeTISTR5339 from 5% (v/v) to 30% (v/v).

Product Development of Spicy Candied Banana Peels and Pseudo-stems from Waste of Dried Banana Production at Ban Bang Ta Chom Community Enterprise. The purpose of this study was developing formula and prototype of spicy candied from Banana Peels and Pseudo-stems waste of dried banana production for 3 products such as Banana Peels Spicy Candy Pseudo-stems Spicy Candy and Banana Peels and Pseudo-stems Gummy. The suitable condition for Banana Peels Spicy Candy was using banana peels as 20% after using tamarind sauce as 20% and fructose syrup as 20%. The result of physical analysis showed that : products have brown dark color flavor and taste sour and sweet and chemical analysis Total dietary fiber: TDF = 8.05 g : 100 and Total sugar = 66.82 g : 100 g The suitable condition for Pseudo-stems spicy candy was using Pseudo-stems as 20% after using tamarind sauce as 20% and fructose syrup as 20%. The result of physical analysis showed that : products have brown dark color flavor and taste sour and sweet and chemical analysis Total dietary fiber: TDF = 10.55 g : 100 g and Total sugar = 66.48 g : 100 g The suitable condition for Banana Peels and Pseudo-stems Gummy was using Banana Peels and Pseudo-stems as 15% after using flavored fruit juice as 75% and fructose syrup as 30%. The result of physical analysis showed that : products have brown light color flavor and taste sour and sweet and flexible texture chemical analysis Total dietary fiber: TDF = 18.91 g : 100 g and Total sugar = 40.85 g : 100 g The shelf life of 3 products in vacuum packaging (VP). The result of microorganism analysis less than standard for safe products. The consumer acceptability like extremely product and Interested in buying products.

The study aims to study the change leadership that affects the organizational culture and work efficiency of the staffs at the operational level and to study the good governance principles that affect the organizational culture and work efficiency of operational staffs at Commercial Concrete Production Business Unit. The population used in the study is 200 operating staffs at Commercial Concrete Production Business Unit using questionnaires for data collection. The data analysis is conducted using descriptive statistics and inferential statistics. The result indicates that change leadership affects organizational culture of operational staffs with statistical significance at 0.05 level. It can predict the organizational culture of operational staffs at 16.30 percent. Good governance principles affect the organizational culture of operational staffs with statistical significance at the level of 0.05. It can predict the organizational culture of operational staffs at 29.50 percent. Change leadership affects the operation efficiency of operational staffs with statistical significance at the level of 0.05. It can predict the work efficiency of operational staffs at 13.80 percent and good governance principles affect the work efficiency of operational staffs with statistical significance at the level of 0.05. It can predict the work efficiency of operational staffs at 28.70 percent.

This research was aimed to study employees’ loyalty in manufacturing industry as well as motivation influencing their loyalty. The samples were 360 employees working in the Food manufacturing industry in six districts in Nonthaburi. The questionnaire was used as a tool to collect data which were analyzed by statistics including percentage mean standard deviation. to test the hypothesis T-test one-way Anova and Multiple Regression Analysis were applied. It was found that most employees werefemale over 36 years of age with lower degrees than bachelors degrees 10000 - 15000 baht monthly income and more thansix years of work experiences. In the overall they had average motivation in performing their work in terms of incentives and supporting factors. Most employees were highly loyal to the organization as a whole namely awareness feelings and expressions respectively. The hypothesis testing determined the statistical significance level at 0 . 0 5 revealed that different genders showed different feelings however they were not different in terms of expressions perceptions and loyalty to the organization. Different ages differed in terms of expressive behavior feelings perceptions and loyalty to the organization.