在高度競爭的食品產業中，如何鞏固產品銷售、維繫產品市占係許多產品經理人關心的議題，本研究以個案分析方法，挑選麥香紅茶、養樂多、滿漢大餐、維力炸醬麵、乖乖、可樂果，探討其產品發展歷程與維繫市占之關鍵。研究發現，產品力為一綜合特質，包含口味、價格、便利性、包裝與食品製程。而食物之口感與風味為影響產品力之基礎，人們對味道之喜好受客群之成長歷程、文化背景、本能喜好所影響。在產品與通路日益競爭的市場，掌握關鍵與足夠少數通路為必要之作為，如何建立品牌資產、提升競爭優勢並整合周邊資源為維繫市占之關鍵。

In the highly competitive food industry, consolidating product sales and main-taining market share are issues that concern many product managers. This study uses case analysis method, selecting products such as Uni-Wheat Black Tea, Yakult, Man Han Chilli Beef Flavor Instant Noodles, Wei-Lih Jah-Jan Noodles, Kuai Kuai, and Lianhwa Pea Cracker, to explore their product development processes and the keys to maintaining market share. The research found that product strength is a composite characteristic, including taste, price, convenience, packaging, and food processing technology. The texture and flavor of food are fundamental to influencing product strength, and people's preferences for taste are influenced by their growth process, cultural background, and instinctual likes. In an increasingly competitive market for products and sales channels, it is necessary to grasp key channels and the sufficient smaller ones. Building brand equity, enhancing competitive advantages, and inte-grating peripheral resources are essential actions for maintaining market share.

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