The objectives of this study is to increase efficiency of steam boiler 2.5 ton per hour which used liquid petroleum gas LPG as fuel. bringing heat recovery inside boiler chimney stack to preheat feed water with technology heat Exchanger Economize. Taking the economizer with its pipe length of 1000 mm and 62 mm diameter for 64 pipe is a cross flow with staggered tube to increase water temperature before entering the boiler pass to deaerator The study is carried out to compare the differences and savings of the feed water temperature steam boiler efficiency and fuel consumption between having the economizer installed and uninstalled. reference to study The result after installed the heat exchanger economizer the feed water is passed into steam boiler deaerator higher temperature from 38.30°C to 67.20°C which leads to increase efficiency of steam boiler from 81.59 % to 85.65 % meaning that the fuel consumption of steam boiler will be reduced 4.97 %

The objectives of this study were to 1) study the satisfaction of users of the Treasury Division Rajamangala University of Technology Phra Nakhon and 2) to compare the satisfaction of users of Rajamangala University of Technology Phra Nakhon according to their personal classification. Thedata were collected from a sample of 214 people. The tool used for collecting data was a questionnaire and the data analysis was performed using frequency percentage mean standard deviation and One-Way ANOV). Scheffe was applied to test the differences of each pair. The results of this research revealed all four aspects of the satisfaction of users of the Treasury Department of Rajamangala University of Technology Phra Nakhon which included the: staff service process of service process facilities and service quality at a moderate level.

The objectives of this research were to study 1) the marketing mix factors of choosing derlers of Japanese imported wind instruments 2) consumer loyalty of choosing derlers of Japanese imported wind instruments and 3) to study the influence of marketing mix factors in choosing derlrs of Japanese imported wind instruments. The sample group was 240 consumers who chose to use sales representatives Japanese imported wind instruments. The questionnaire was used to collect data in the metropolitan areas. The data were analyzed using statistics including frequency percentage mean standard deviation and multiple regression analysis which was applied to test the hypothesis. The study result indicated that most respondents were males aged between 31 - 40 years old working as engineers earning monthly income averaged between 20001 - 40000 baht. The marketing mix factors of Japanese imported tools dealers in terms of the distribution channel was considered highest followed by the price process personnel product physical characteristics and the marketing promotion respectively. Regarding the consumer loyalty in choosing Japanese imported wind instrument dealers the highest was word of followed by the price sensitivity purchasing intention and claim behavior respectively. The hypothesis testing reveal that the marketing mix factors in terms of price did influence the loyalty in all aspects namely word of mouth purchasing intention price sensitivity and claim behavior. Therefore the hypothesis was accepted. The marketing mix factor related to product had no influence on loyalty in every aspect such as word of mouth purchasing intention price sensitivity and claim behavior. Therefore the hypothesis was rejected. The marketing mix factor related to the process and price that influenced the consumer loyalty towards word of mouth in choosing dealers of Japanese imported wind instruments. The marketing mix factors related to price sales staff and distribution channels influenced the consumer loyalty in choosing dealers of Japanese imported wind instruments. The marketing mix factors related to price sales staff and process influenced the consumer loyalty and price sensitivity in choosing dealers of Japanese imported wind instruments. The marketing mix factors related to the physical characteristics price and marketing promotion influencing consumer loyalty claim behavior and promotion in choosing dealers of Japanese imported wind instruments.

The research objectives were aimed to scrutinize problems of quality control in accounting firms for accounting services in Nonthaburi. The samples used in this study were 105 accounting firms registered with the Department of Business Development with the business purpose was to provide accounting services in Nonthaburi province. The statistics used in data analysis were frequency distribution percentage mean standard deviation t-test and one-way ANOVA; then Least Significant Differentiation (LSD) was applied to test each pair. The results revealed that most chief accountants were 41-50 years old female with bachelors’ degrees and had more than eight years’ work experience. Most accounting firms were limited companies with the work duration period of serving 6 to 10 years with 1 to 5 employees and at least 50 customers. They had not been certified according to the announcement of the Department of Business Development. The overall problems regarding the quality control were relatively high. The highest aspect was related to ethics followed by the management responsibility within the accounting firms and work operation. Based on the hypothesis testing different ages and types of accounting had different opinions on quality control issues at 0.05 statistically significant difference; and different genders education levels experiences and work tenures number of employees number of customers and accreditation of accounting firms did not differ in terms of available opinions. ง Concerning problems regarding quality control in accounting firms employees should be promoted to enhance their knowledge and performance understand the quality assurance system of accounting firms. Also The Department of Business Development should provide trainings for accountants working for the accounting firms in order to achieve effective implementation and obtain higher potential for extra accounting quality.

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.