Abstract:
The purposes of this study were to: (1) identify the consumer behavior that affected the decision to use Kerry Express and Thailand Post services, (2) compare between the expected quality and the perception of quality of the services, (3) study the perception of quality that affected the decision on the service use, and (4) study the perception of efficiency that affected the decision on the service use. The research samples were 400 consumer of use the Kerry Express and Thailand Post in Phra Nakhon Si Ayutthaya province. The research instrument was a questionnaire from which the collected data were analyzed using Percentage, Mean, Standard Deviation, Independent Sample t-test, One-way ANOVA (F-test), Paired t-test and Multiple Regression Analysis. The results showed that age was the most important personal factor that affected the participants decision to use the Kerry Express service, while the Thailand Post service was affected by the factors of gender and monthly income. Additionally, the expected quality and the perception of quality were different. The findings also revealed that the perception of quality in terms of reliability (β = 0.409), the perception of efficiency in terms of ample service (β = 0.298) and progression service (β = 0.326) had an influence on the decision on the service use of Kerry Express. Likewise, the perception of quality in terms of reliability (β = 0.255), responsiveness (β = 0.292), and empathy (β = 0.333); and the perception of efficiency in terms of equitable service (β = 0.221), ample service (β = 0.346), and progression service (β = 0.314) had an influence on the decision on using Thailand Post service.