The purposes of this research were 1) to study the personal factors of Mahachai Market customers 2) to study coconut sugar buying behavior of Mahachai Market customers 3) to study the factors of marketing mix associated with coconut sugar buying behavior of Mahachai Market customers 4) to study the relationship between personal factors and coconut sugar buying behavior of Mahachai Market customers 5) to study the relationship between marketing mix and coconut sugar buying behavior of Mahachai Market customers The population was 200 coconut sugar buyers in Mahachai Market. The research instrument and to collect data was questionnaire. The statistics used to analyze the data were frequency percentage mean standard deviation and Pearson chi-square. The data were analyzed by SPSS. The research found that 1) the most Mahachai Market customers were female age range in 35 - 45 years monthly income was in a range of 25001 – 35000 Baths and lived in the central region. 2) coconut sugar buying behavior of Mahachai Market customers found that reason to buy was for family consumption the an average quantity bought was 1-5 kgs cost of buying was 101 - 300 Bahts the frequency of buying is one time per month coconut sugar was bought in small cups and one who influenced decision was oneself. 3) marketing mix associated with coconut sugar buying behavior of Mahachai Market customers found consumers has high level satisfaction and when considered each aspect the highest level satisfaction was price and product high level satisfaction was place and the moderate level satisfaction was promotion. 4) relationship between personal factors and coconut sugar buying Behavior of Mahachai Market customers were positive in gender age income and place of living at statistically significance of .05 level and 5) relationship between marketing mix and coconut sugar buying Behavior of Mahachai Market customers were positive in place and promotion at statistically significance of .05 level.

The purposes of this study were to 1) study consumer’s behavior at Yellow Orchids restaurant at the Operation Center of Thai Airways International 2) investigate marketing strategies affecting the consumer’s decision on choosing the Yellow Orchids restaurant 3) compare personal factors affecting the consumer’s decision on choosing Yellow Orchids restaurant. The sample group was 350 Thai customers using the restaurants. The sample group was chosen by using the accidental sampling technique. The questionnaire was used in this study to collect data. The statistics used in this research were percentage mean frequency standard deviation t-test and F-test. The result showed that the majority of consumers were women aged over 45 years old with monthly income in a range of 25001-35000 bath. As for the consumer’s behavior it was found that they came here to have food during 11.01- 13.00. They spent less than 1000 bath. They usually order Thai food. The factor involving the decision was self-decision making As for the marketing strategies affecting the consumers in using Yellow Orchids restaurant all strategies were rated high with price and service ranking highest ( = 4.15) physical environment ( = 4.14) product ( = 4.11) personnel ( = 4.10) channel ( = 3.86) and sale promotion ( = 3.79) respectively. According to the comparative marketing strategies affecting consumers in using the service of Yellow Orchids restaurant it was found that sex or gender played no role in using the restaurant. However age affected the product price sale promotion personnel service and physical environment with significant statistic level at 0.05. It was also found that monthly income affected product sale promotion service with significant statistical level at 0.05.