## 3 Design Solution for Ice Fishing Safety Auxiliary Product
### Kano Model Solution
#### 3.1.2 User Requirement Analysis  
The KANO model, proposed by Professor [PERSON] of the University of Tokyo in the late 20 th century, is an effective tool for analyzing the nonlinear relationship between product performance and user needs based on user satisfaction. It provides both qualitative and quantitative analysis of user requirements [11]. By analyzing users' satisfaction with a product, the model helps guide product feature upgrades. The KANO model categorizes user needs into five types based on satisfaction and quality characteristics: Must-be Quality (M), One-dimensional Quality (O), Attractive Quality (A), Indifferent Quality (I), and Reverse Quality (R) [12]. The KANO model accurately captures user needs, adjusts product development direction, and ensures successful product positioning. Using KANO questionnaires, we conducted a deeper analysis of the importance of user needs for ice fishing safety assistance products. Given the unique and diverse requirements of ice fishing, which takes place in cold outdoor environments, the survey process is inherently complex. To ensure the accuracy of the survey results, we segmented the user groups into ice fishing enthusiasts, safety supervisors (or companions), and product maintenance personnel, distributing the questionnaires in a 6:3:1 ratio. A total of 200 questionnaires were distributed, and by combining the results with the KANO evaluation table, we conducted a detailed analysis of the attributes of user needs and clearly distinguished the KANO attributes for each requirement.  
To determine the attributes and weights of requirement elements, the Better-Worse coefficient analysis method was used [13]. Using Formulas (1) and (2), the user satisfaction improvement coefficient T\({}^{\prime}\) and the satisfaction decline coefficient W' were calculated. The survey results were processed according to the scale and computed, and the classification results of functional attributes are presented in Table 2.  
\[T^{{}^{\prime}}=\frac{A+O}{A+M+O+I} \tag{1}\]  
\[W^{{}^{\prime}}=-\frac{M+O}{A+M+O+I} \tag{2}\]  
After qualitative and quantitative analysis of user requirements, the findings were as follows:  
* Must-be Quality (M): Safety assurance, stability, and ice fishing functionality.
* Attractive Quality (A): Quick installation, easy cleaning, and aesthetic design.
* One-dimensional Quality (O): Easy maintenance, portability, anti-slip, and easy operation.
* Indifferent Quality (I): Lighting, low-temperature adaptability, and reasonable pricing.  
Since Indifferent Quality (I) does not significantly impact user satisfaction during the design phase, this study focuses on Must-be Quality (M), One-dimensional Quality (O), and Attractive Quality (A) as the starting points for subsequent design research.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Coding** & **Requirements** & **Coding** & **Requirements** & **Coding** & **Requirements** \\ \hline B1 & Safety assurance & B6 & Quick installation & B11 & Easy cleaning \\ B2 & Lighting & B7 & Anti-slip & B12 & Easy operation \\ B3 & Ice fishing functionality & B8 & Low-temperature adaptability & B13 & Aesthetic design \\ B4 & Easy maintenance & B9 & Reasonable pricing & & \\ B5 & Portability & B10 & Stability & & \\ \hline \hline \end{tabular}
\end{table}
Table 1: Hierarchical list of user requirements for ice fishing safety auxiliary product.