This study overcomes the limitations of the technology life cycle (TLC) model by deriving a product lineage within a phylogenetic tree to identify the product development trajectory and quantitatively measure innovativeness by measuring the average information content of the product's technical characteristics. The cyclical pattern of changes in the innovativeness in product lineage was modeled, referred to as the product lineage life cycle (PLLC) model. To verify the appropriateness of the proposed models, an empirical study was conducted using 11,013 mobile products introduced into the global market from 1995 to 2021. The results indicate that the PLLC model provides product-level technology life-cycle information, which can be used for specific product development strategies at the firm level. Moreover, product development strategies among firms were observed by constructing firm-level PLLCs into a phylogenetic tree; successful innovative firms accumulated high product innovativeness within their unique product lineages. The results of this study contribute to academic diversity by providing an alternative approach and a microfoundation to the majority of existing TLC research fields. This is expected to enable life-cycle analysis of detailed products, which can contribute to specific technology development strategies of firms for their products.

本研究克服了技术生命周期（TLC）模型的局限性，通过在系统发育树中推导产品谱系来识别产品开发轨迹，并通过测量产品技术特征的平均信息内容来定量测量创新性。对产品谱系创新性变化的循环模式进行了建模，称为产品谱系生命周期（PLLC）模型。为了验证所提出模型的适当性，对1995年至2021年进入全球市场的11,013种移动产品进行了实证研究。结果表明，PLLC模型提供了产品级技术生命周期信息，可用于公司层面的具体产品开发策略。此外，通过将公司级 PLLC 构建成系统发育树来观察公司之间的产品开发策略；成功的创新公司在其独特的产品系列中积累了高度的产品创新能力。这项研究的结果为大多数现有的 TLC 研究领域提供了替代方法和微观基础，有助于学术多样性。预计这将能够对详细产品进行生命周期分析，从而有助于制定公司产品的具体技术开发战略。