自泡沫紅茶店興起後，且因為氣候越來越炎熱，使得臺灣國內飲料店的家數以及營業額連年上升，2015年飲料店業營業額接近500億台幣，市場越來越競爭。因此，本研究希望能以台灣民眾為例，透過聯合分析法找出消費者心中手搖杯飲料產品屬性最佳組合，並希望透過此研究能夠給予現行商家或是準備進入市場的廠商一些參考依據。
　　本研究以聯合分析法為主體，透過產品屬性理論將手搖杯飲料視為一項產品，將其分析並拆解選出九項常用產品屬性，再經由前測測問卷篩選出四項相對重要之產品屬性，分別為「口味」、「價格」、「品牌」、「折扣或促銷活動」，將此四種產品屬性加入正是問卷之屬性水準設定，依據文獻與現實情況設定不同之水準，透過聯合分析法計算出不同屬性水準對於受測者之成分效用值與重要性權重，進而分析與了解消費者對於手搖杯飲料之偏好與最佳組合。
　　本研究結果發現，全體受測者之最佳產品組合為「CoCo」、「30元~60元」、「鮮奶茶」、「有促銷或折扣活動」，其中受測者對於「價格」之重視程度最高，其重要性權重最大，而「口味」次之。本研究另利用人口統計變數，分析不同性別、年齡、收入、職業和學歷之族群對於手搖杯飲料各項屬性重視程度之差異。

SUMMARY
Due to the rise of the bubble tea shops and hotter weather, tea shops and sales in Taiwan are increasing every year. The sales of tea shops are nearly fifty billion in 2015, and the competition among the shops is becoming more and more intense. Therefore, this study aims to identify hand-shaken drinks’ best combination of product attributes by conjoint analysis, and hopes to give existing shops or manufacturers which want to enter the market some reference through this research.
This study’s purpose is to figure out the optimal combination by using conjoint analysis, and the research object is the people who live in Taiwan. At first, the research found out top four hand-shaken drinks’ attributes by pilot test, which are “taste”, ”price”, ”brand” and ”discounts or promotions”. Further, the study used top four attribute to set up the level of attribute and building nine cards as “stimulus set”.
The study found out that the best hand-shaken drinks attributes combination consists of “CoCo”, “thirty one NT dollars to sixty NT dollars”, ”milk tea” and “have discounts or promotions”. And the study showed that ”price” and “taste” are the two most important hand-shaken drinks attributes to the customer. This study also used demographic variables to analyze the preference of different groups of ”gender”, “age”, “income”, “occupation” and “education”.

Key words: Conjoint analysis, Product attribute theory, Hand-shaken drinks, Part-worth utility
INTRODUCTOIN
Due to the rise of the bubble tea shops and hotter weather, tea shops and sales in Taiwan are increasing every year. The sales of tea shops are nearly fifty billion in 2015, and the competition among the shops is becoming more and more intense. Therefore, this study aims to identify hand-shaken drinks’ best combination of product attributes by conjoint analysis, and hopes to give existing shops or manufacturers which want to enter the market some reference through this research.

Based on previous studies, the introduction of green tea beverage has allowed diverse consumers to consume green teas and related products. In particular, health related information, price and packaging, would affect the flavor acceptability of green tea beverage depending on consumers’ age and gender (Bae et al., 2015). Tseng (2009) looked into Tainan’s beverage market, price promotion, brand name image and perceived value make some influence on consumers of the purchase decision-making. Promotion price has a positive impact on the purchase of consumer willingness.

After the pilot test, this study choose the top four attribute to build final test, the final test questionnaire is consisted of 9 stimulus generated by SPSS22.0. Finally, this study find “price” is the most valuable attribute to the respondents and the optimal hand-shaken drinks combination is “CoCo”, “thirty NT dollars to sixty NT dollars”, ” milk tea” and “have discounts or promotions”.

MATERIALS AND METHODS
In this study, the product attribute theory is used to determine the attribute of hand-shaken drinks. The primary method is conjoint analysis in this study. Conjoint is a way to analyze psychological preferences, and is often used in research on decision making related to products with multiple attributes. It assumes that consumers make decision on purchasing a product comprises a combination of various attributes, and that consumers decide to purchase a product because what combination of attributes provides is sufficient to meet their needs. This study employed conjoint analysis to explore the importance of various attributes of hand-shaken drinks to assist firms in the development of new products to meet consumers.

There are two steps in this research, pilot test and formal test. We chose the top four attributes according to the result of pilot test. The final questionnaire is built by the top four attributes. This study included nine cards through SPSS22.0 orthogonal experimental design in the final questionnaire. Finally, this study segments respondents into different groups and analyze the preference of attributes of different groups.

RESULTS AND CONCLUSION
After pilot test, we found that” Brand, Price, Taste, Discounts or promotions” are top four attributes for hand-shaken drinks. After collecting 187 samples, we found that the most important product attribute is “Price”, the second is “taste”, the third is “brand” and the last one is “discounts or promotions”. And the best hand-shaken drinks attributes combinations is consisted of “CoCo”, “thirty one NT dollars to sixty NT dollars”, ”milk tea” and “have discounts or promotions”.

CONCLUSION
The objective of the study is to find out the importance of various attributes of hand-shaken drinks which can assist firms in the development of new products capable of meeting the needs of consumers. However, there are some limitations, for example, most samples we collected are from the age 15 to 34 years old. It is not representative enough of the overall market. Moreover, respondents are almost students, who may be more sensitive to price.

According to the results, we found that the most important product attribute is “Price”, the second is “taste”, the third is “brand” and the last one is “discounts or promotions”. The results showed that when it comes to purchasing hand-shaken drinks, consumers’ first concern is price. This study can suggest that hand-shaken drinks firm should focus on pricing strategies.

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