PSI - Issue 8

A. Grassi et al. / Procedia Structural Integrity 8 (2018) 573–593 Author name / Structural Integrity Procedia 00 (2017) 000 – 000

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Before starting the interview, it was fundamental to understand if the participants were aware of passive safety devices/systems. In case of vague responses, explanations and examples were provided. From these interviews potential problems to solve and some product requirements to be implemented were identified. The survey was organized in two main parts: the first one focused on the definition of rider ’s profile, including its mobility habits and its general use of passive safety systems; the second one to collect rider ’s requirements regarding basic features of new passive safety systems for PTWs. For the second part, a pair of questions were formulated for each product feature: the first question considers the customer ’s reaction if the product feature was implemented, the second (dysfunctional form of the question) concerns the reaction if the feature was not implemented. By combining the two answers in the evaluation table (Table 1), every product feature could be classified. Table 1 . Kano’s evaluation table : A - Attractive; O - One-dimensional; M - Must-be; Q – Questionable; I – Indifferent; R – Reverse. Customer requirements Dysfunctional (negative) question Like Must be Neutral Live with Dislike Functional (positive) question Like Q A A A O Must be R I I I M Neutral R I I I M Live with R I I I M Dislike R R R R Q In the specific, the fourteen pairs of questions focused on the following features of the safety device:  integration on the PTW;  obligation to wear it;  partial limitation of the movements during its use;  possible re-use after a crash;  possibility to use/transfer it on other motorcycles;  functionality dependent on other devices;  comfort limitation;  influence on PTW handling;  influence on the PTW performance;  modification of the "classic" PTW aesthetic;  its inexpensiveness (device cost); In the second part of the survey, fourteen pairs of questions, formulated according to Kano’s method, were includ ed to establish customers’ priorities regarding the main features of the passive security systems. To process the results of the survey, Customer Satisfaction Coefficients (CSCs) were used. Each coefficient indicates the strength of a product feature to influence customer satisfaction or, in case of its non-fulfillment, customer dissatisfaction (Berger et al. (1993); Matzler and Hinterhuber (1998); Zhu et al. (2010); Mote et al. (2016)). To calculate the average impact on satisfaction, it is necessary to add the attractive and one-dimensional answers and divide by the total number of attractive, one-dimensional, must-be and indifferent responses (Eq. (1)). For the calculation of the average impact on dissatisfaction the sum of the must-be and one-dimensional columns has to be divided by the same normalizing factor as shown in Eq. (2). A minus sign in the Dissatisfaction Index (DI) emphasizes its negative influence on customer satisfaction.  increase of the PTW cost;  limitation of the visibility;  integration of multimedia features.

A O A O M I    

(1)

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( ) Customer s Satisfaction coefficient SI

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O M A O M I    

(2)

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( ) Customer s Dissatisfaction coefficient DI

( 1) 

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