In recent years, “connected new products,” which work in sync with other devices or services, have surged in number. Such as products offer consumers with multiple usage values. Consequently, it has become difficult to evaluate a product based on its attributes using particular product usage, and traditional consumer decision-making models have not been able to apply to consumers' adoption of new products. This study attempts to explain this phenomenon from analogizing cases that are past similar experiences and simulating scenarios that are future images regarding product usage. Specifically, two distinct case and scenario-based decision models that are developed to confirm the integration pattern of cases and scenarios. These models are investigated through questionnaire surveys regarding the adoption decision for the new product, “Smart Display.” The estimation results demonstrate that the case and scenario-based decision model can elucidate consumers' adoption decisions for connected new products. Furthermore, it is clarified that consumers evaluate cases and scenarios independently.