http://www.press.ierek.com ISSN (Print: 2537-0154, online: 2537-0162) International Journal on: The Academic Research Community Publication DOI: 10.21625/archive.v2i4.392 Integrative Framework of Kansei Engineering (KE) and Kano Model (KM) applied to Light Bulb Changer Soheir Backar1 1(Assisstant Professor): Production Engineering Department, Faculty of Engineering, Alexandria University Abstract Currently, any industries face higher competition in their business pertinent to the customers’ demands and prod- uct design requirements. Customer requirements and satisfaction measurement can be achieved through various methods. This paper presents an integrative framework of Kansei engineering (KE) and Kano model, applied to a product (light bulb changer LBC). KE captures and translates the emotional needs of the customer (Kansei), whereas Kano model is inserted into it to investigate the relationship between service quality attribute performance and Kansei. On this research, the integration between KE and KM in product development approach is applied though a daily life product as a case study (LBC product). The results show that the mechanical mechanism con- sisting of spring fingers with pvc, round grip and plastic telescopic pole is preffered by customers. This study found that the perceived or quality attributes are influenced by the emotional design or Kansei response. It provides the useful spectrum to other researchers to gain more powerful product development in the future, and stay on the customer satisfaction and requirement track. © 2019 The Authors. Published by IEREK press. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/). Keywords Kano method (KM); Kansei Engineering (KE); Product Development Process (PDP); Semantic Differential (SD) 1. Introduction The customer satisfaction is one of the challenges on how they can deliver the quality of the product for their success and survival in today’s competitive environment. Kansei engineering can be used as a tool for creative product development generating new revolutionary solutions (Koleini et al., 2014). Also, Kano questionnaire is very helpful in measuring customer satisfaction (Mostafa et al., 2013). Qiting et al. made a questionnaire to determine the customer needs and satisfaction at Shanghai Disneyland (Qiting et al, 2012). Integration between kansei engineering and kano model is a new field to develop products and services to achieve customer satisfaction fulfillment. Lanzotti and Tarantino suggested the idea of integration of KE and KM existing in PD (Lanzotti and Tarantino, 2008). Schutte et al applied this integration in the service development (Schutte et al., 2004). Fevi et al proposed an integration framework of KM and KE towards a product used in our daily life; pen design development (Fevi et al., 2014). This research tries to find out the relevant features in the product development process and how they meet the characteristics required by the customers using Kansei Engineering (KE) and Kano Method (KM). Both approaches pg. 430 https://creativecommons.org/licenses/by/4.0/ Backar / The Academic Research Community Publication are integrated as the structural model of customer satisfaction that will be functioned to help the designer or producer to generate the questionnaire as an initial process to gain the data collection. Neither KE nor KM are sufficient to make the customer fully satisfied. So, integration helps to achieve customer requirements (CR) fulfillment. Figure 1 shows the integration approach between KE & KM. In this study, we illustrate the integration between KE and Kano model through a procedure that helps in increasing customer satisfaction and maximizing profit applied to a certain product (light bulb changer). This helps to deter- mine the strength and weakness in the integration process to be able to develop the procedure in the future. Also, a complete analysis of questionnaire results and obtaining the most important KWs and elements of the product will be applied. Figure 1. The integration approach between KE & KM 2. Methodology The integration approach between KE and KM depends on three basic phases; collection of Kansei words, relating KWs with engineering characteristics, and implementing Kano model. 2.1. Collection of Kansei words: Table 1 shows the 78 words that have been collected and gathered to form a new database for light bulb changer. Table 1. Kansei words Modern Self-sacrificed Classic futuristic Vulnerable charming Strong Comfortable Professional Lively Neutral cheap Expensive Firm Cool Unique Long Organic Domestic Convenient impressive Lovely Rustic moderate Real Attractive Surreal alignment Sensibility flexibility Friendly Simple sophisticated adorable low profile public Cute Stylish Luxury monotonous Bold soft Beautifully Creative masculine light weight Romantic bright Continued on next page pg. 431 Backar / The Academic Research Community Publication Table 1 continued Healthy Chic refreshing Boring Neat calm Relaxing Plain Hard Mellow eye catching artificial Complex Warm Loose Sleek Stationary transparency Rough Smooth Durable Thick Vitality safety Tough Brilliant Pure practical Pleasant Tasty It was necessary to collect some of the words (Kansei words) that might reflect the needs of the customer and that relate to the product which will help us in thinking about the proposals for a new product suitable to the needs of the customer. Depending on the considered domain, the Kansei words generally vary from 50 to 600 (Nagamachi et al., 2008). In order to get a complete selection of words all available sources have to be used, even if the words emerging seem to be similar or the same (Schutte, 2002). 2.2. Semantic Differential (SD) scale Semantic differential is a type of a rating scale designed to measure the connotative meaning of objects, events, and concepts. The connotations are used to derive the attitude towards the given object, event or concept or is a standard visual analogue scale (vas) and a 7-grade-likert scale.In order to ensure that the word was properly understood, the extremes on the opposite sides of the scales were symbolized by (very much) and (not at all). We weight every word to determine its importance, then select the most important words to be used in kano ques- tionnaire. Thirty five participants were interviewed and asked to answer the SD scale questionnaire. Table 2 shows an example of the response of participant no 1. Table 2. An example of the response of participant 1 customer no: 1 light bulb changer Kansei word Not at all 1 2 3 4 5 6 7 1 modern x 2 strong x 3 expensive x 4 omestic x 5 real x 6 friendly x 7 cute x 8 beautifully x 2.3. Importance weighting In our study, we use (SD) scale to measure the importance of each word and choose the most important words which have high grades, also we calculate the weight of each word to determine the importance of the word. The weight = (the total grades of word) / (7*no of participant). Table 3 represents the grade of kansei words and importance weighting. After selecting the words that have the highest degrees and the highest weights. We collect all selected words in a table (meaning table; table 4). Table 4 shows that the six words that have the highest grade are comfortable, convenient, attractive, simple, light weight, and durable. pg. 432 Backar / The Academic Research Community Publication 2.4. Relating KE with engineering characteristics (ECs) The chosen elements (characteristics) related to the most appropriate word of kansei words by brainstorming. These words & elements are combined together in a questionnaire (Kano Questionnaire). Sauerwein et al. focused that each question must be involved some requirements of the product related to kansei words which must be suitable with this requirement (Sauerwein et al., 1996). In this study, the questionnaire includes three sections, two sections (functional and dysfunctional) to check the LBC design (grip shape, grip material, telescopic pole) and one section to choose the LBC mechanism among (air suction, mechanical, and electrical). The number of questions are thirty four divided to seventeen functional questions and seventeen dysfunctional questions. Table 5 shows an example of functional questions in the Kano questionnaire. The questionnaires are distributed to 40 participants. By combining the answers of functional and dysfunctional requirements in the kano evaluation table 6, the product features can be classified into A (attractive), O (one- dimensional), M (must be), I (indifferent), R (reverse). Then, this data is analyzed by a mathematical approach. The mathematical model is to measure the customer satisfaction or dissatisfaction: Customer satisfaction (S.C) = (A+O) / (A+O+M+I) Customer dissatisfaction (D.C) = (O+M) / (A+O+M+I) Total C.S.C (T.C.S) = (A-M) / (A+O+M+I) Table 3. Grade and weighting of Kansei words KWs GRADE weight KWs GRADE weight Modern 144 0.587755102 bright 106 0.432653061 Strong 129 0.526530612 soft 139 0.567346939 Expensive 102 0.416326531 public 136 0.555102041 Domestic 68 0.27755102 flexibility 87 0.355102041 Real 103 0.420408163 moderate 97 0.395918367 Friendly 60 0.244897959 conservative 107 0.436734694 Cute 67 0.273469388 cheap 183 0.746938776 Beautifully 132 0.53877551 charming 87 0.355102041 self-sacrificed 87 0.355102041 sexy 104 0.424489796 Comfortable 190 0.775510204 chic 128 0.52244898 Firm 136 0.555102041 refreshing 114 0.465306122 Convenient 173 0.706122449 boring 83 0.33877551 Attractive 181 0.73877551 neat 78 0.318367347 Simple 189 0.771428571 calm 87 0.355102041 Stylish 151 0.616326531 relaxing 78 0.318367347 Creative 113 0.46122449 plain 65 0.265306122 Classic 132 0.53877551 hard 136 0.555102041 Professional 80 0.326530612 mellow 103 0.420408163 Cool 108 0.440816327 eye catching 127 0.518367347 Impressive 92 0.375510204 artificial 100 0.408163265 Surreal 102 0.416326531 complex 82 0.334693878 Sophisticated 119 0.485714286 warm 68 0.27755102 Luxury 99 0.404081633 loose 60 0.244897959 Masculine 74 0.302040816 sleek 97 0.395918367 Futuristic 155 0.632653061 stationary 87 0.355102041 Continued on next page pg. 433 Backar / The Academic Research Community Publication Table 3 continued Lively 100 0.408163265 transparency 120 0.489795918 Appealing 105 0.428571429 rough 102 0.416326531 Lovely 113 0.46122449 smooth 120 0.489795918 Alignment 133 0.542857143 durable 167 0.681632653 Adorable 113 0.46122449 thick 143 0.583673469 Monotonous 95 0.387755102 vitality 134 0.546938776 light weight 177 0.72244898 safety 190 0.775510204 Vulnerable 100 0.408163265 tough 106 0.432653061 Neutral 81 0.330612245 brilliant 139 0.567346939 Unique 132 0.53877551 pure 126 0.514285714 Rustic 120 0.489795918 practical 103 0.420408163 Sensibility 121 0.493877551 crunchy 101 0.412244898 low profile 123 0.502040816 organic 88 0.359183673 Bold 102 0.416326531 healthy 100 0.408163265 Romantic 108 0.440816327 Table 4. The meaning table No Kansei words Meaning Positively correlated to KW Negatively correlated to KW Word 1 Comfortable SD words: -Miserable - comfortable Providing physical well-being or relief -light -good -pleasant -miserable -boring Word 2 Convenient SD words: -Inappropriate -Convenient Fitting in well with person’s needs. -suitable -appropriate -Inappropriate -unsuitable Word 3 Attractive SD words: -Barren -attractive Pleasing or appealing to the senses. -Lovely -likable -Barren -Unattractive Word 4 Simple SD words: -complex -simple Easily understood or done; presenting no difficulty. -Noncomplex -uncombined -Complex -intricate Word 5 Light weight SD words: -heavy -light weight Easy to carry it. -Easy to carried. -heavy Word 6 Durable SD words: -Jerrybuilt -durable Able to withstand wear, pressure, or damage; hard-wearing. -Industrial -strength - tough -Jerrybuilt -Nondurable pg. 434 Backar / The Academic Research Community Publication Table 5. An example of functional questions in the Kano questionnaire Grip Shape 1- A LBC with a round grip on the handle helps me to feel comfortable as it gives physical relief while using it. 1- Like. 2- Must be. 3- neutral. 4- Live with. 5- Dislike. 2- A LBC with a hexagonal grip on the handle helps me to feel comfortable as it gives physical relief while using it. 1- Like. 2- Must be. 3- neutral. 4- Live with. 5- Dislike. 3- A LBC with a triangular grip on the handle helps me to feel comfortable as it gives physical relief while using it. 1- Like. 2- Must be. 3- neutral. 4- Live with. 5- Dislike. Grip material 4-A LBC with grip made of foam sponge seems to be convenient. 1- Like. 2- Must be. 3- neutral. 4- Live with. 5- Dislike. 5-A LBC with grip made of PVC seems to be convenient. 1- Like. 2- Must be. 3- neutral. 4- Live with. 5- Dislike. 6-A LBC with grip made of soft rubber seems to be convenient. 1- Like. 2- Must be. 3- neutral. 4- Live with. 5- Dislike. Telescopic pole 7- Using a telescopic pole made of plastic makes it feel light weight. 1- Like. 2- Must be. 3- neutral. 4- Live with. 5- Dislike. 8- Using a telescopic pole made of Aluminum makes it feel light weight. 1- Like. 2- Must be. 3- neutral. 4- Live with. 5- Dislike. 9- Using a telescopic pole made of Tin makes it feel light weight. 1- Like. 2- Must be. 3- neutral. 4- Live with. 5- Dislike. 9- Using a telescopic pole made of Tin makes it feel light weight. 1- Like. 2- Must be. 3- neutral. 4- Live with. 5- Dislike. Table 6. Kano Evaluation Table pg. 435 Backar / The Academic Research Community Publication 3. Analysis of Kano Model Questionnaire Results 3.1. Grip shape analysis The participants were asked to choose among (round, hexagonal, and triangular). Table 7 illustrates the arrangement of customers’ requirements and the values of satisfaction and dissatisfaction factor for grip shapes. Table 7. Thearrangement of customers’ requirements and the values of satisfaction anddissatisfaction factor for grip shape Q # D.C S.C Q R I M O A Q # Grip shape G.D G.S Grip shape 1&18 -0.6875 0.53125 1 7 6 9 13 4 1&18 2&19 -0.4482758 0.4827586 1 10 8 7 6 8 2&19 3&20 -0.25 0.25 0 20 14 1 4 1 3&20 Due to the result of total satisfaction factor, it’s clear that (round shape) is the most satisfactory. So, the new design should consider the grip to be round. 3.2. Grip material analysis The participants were asked to choose among (foam sponge, PVC, and soft rubber). Table 8 illustrates the arrange- ment of customers’ requirement and the values of satisfaction and dissatisfaction factor for grip material Table 8. Thearrangement of customers’ requirements and the values of satisfaction anddissatisfaction factor for grip material Q # D.C S.C Q R I M O A Q # Grip shape G.M.D G.M.S Grip material 1&18 -0.6666666 0.4666666 0 10 6 10 10 4 4&21 2&19 -0.3846153 0.5 0 14 8 5 5 8 5&22 3&20 -0.5757575 0.3333333 0 7 11 11 8 3 6&23 Due to the result of total satisfaction factor, it’s clear that (PVC) is the most satisfactory. So, the new design should consider the grip to be made of PVC material. 3.3. Telescopic pole material The participants were asked to choose among (plastic, aluminum, tin). Table 9 illustrates the arrangement of customers’ requirements and the values of satisfaction and dissatisfaction factor for telescopic pole material. Table 9. The arrangement of customers’ requirements and the values of satisfaction and dissatisfaction factor for telescopic pole material Q # D.C S.C Q R I M O A Q # Telescopic pole material T.M.D T.M.S Telescopic pole material 7&24 - 0.513513514 0.648648649 0 3 4 9 10 14 7&24 8&25 - 0.285714286 0 0 19 15 6 0 0 8&25 9&26 - 0.333333333 0.095238095 1 18 13 6 1 1 9&26 Due to the result of total satisfaction factor, it’s clear that plastic telescopic pole is the most satisfactory. So, the new design should consider the telescopic pole made of plastic. pg. 436 Backar / The Academic Research Community Publication 3.4. Mechanical Analysis The participants were asked to choose among (air suction, mechanical, and electrical). Table 10 repreents the result. Table 10. Mechanical Mechanisms Result Mechanism Air suction Electrical Mechanical Score 11 7 22 Due to the results, it’s clear that (mechanical mechanism) is the most satisfactory. So, we will focus only on the results of mechanical mechanisms to show which one is the most satisfactory. The participants were asked to choose among (clamp&collet, spring fingers, and interference). Results are indicatd in Table 11. Table 11. The arrangement of customers’ requirements and the values of satisfaction and dissatisfaction factor for mechanical mechanisms Mechanical Q# M.D M.S Q R I M O A Mechanical Q# 13&30 -0.222222222 0.222222222 0 13 7 0 2 0 13&30 14&31 -0.5 0.6 0 2 4 4 6 6 14&31 15&3215&32 -0.272727273 0.272727273 0 11 7 1 2 1 15&32 3.5. The chosen elements Due to the result of total satisfaction factor, it’s clear that spring fingers mechanism is the most satisfactory. So, the new design should consider the mechanism to be spring finger (mechanical). Figures 2, 3, and 4 represents the elements and designs selected due to participants choices. Figure 2 represents the elements have been chosen due to achieving customer satisfaction in grip ship and grip material. Figure 2. Grip shape and grip material Figure 3 represents the elements have been chosen due to achieving customer satisfaction in telescopic pole mate- rial and mechanism. Figure 4 represents the element has been chosen due to achieving customer satisfaction in mechanical mechanism. 4. Discussion and Conclusion This study followed the known methods in collecting kansei words to establish a database. It also applied S-D Scale as a guaranteed way to determine the important kansei words to form a meaning table. But on the other hand it contributed remarkably in: pg. 437 Backar / The Academic Research Community Publication Figure 3. Telescopicpole material and mechanical mechanism Figure 4. Mechanical mechanism – Applying the integration process on a new product with variable categories. – LBC is a new product to the Egyptian market – Contains four categories (grip shape, grip material, telescopic pole, and mechanism). – Developing Kano questionnaire to be in harmony with the product categories and characteristics. The new construction of the questionnaire is rich with choices among mechanisms, then choices among different designs in every mechanism. – Analyzing data using a simple but valuable method to get accurate and detailed results. – This study was able to develop the procedure of integration between KE & KM by applying recommenda- tions deduced by the previous studies. Most of previous studies neither either deal with many categories nor put elements and KWs in order, they concerned only in the most important element and KW. – We made sure to mention all details in the integration process to be reliable in the future for other researchers or for industry men to follow. Most papers or studies we have faced didn’t contain enough information to apply in industry. – The significant conclusions for this study are as follows: pg. 438 Backar / The Academic Research Community Publication – The design (spring fingers mechanical mechanism with round, PVC grip and plastic telescopic pole) is the most satisfactory and it will be the best design that would achieve customers’ pleasure. Also, it was found that the element (plastic telescopic pole) has the highest value of total customer satisfaction (T.C.S) = (0.135135) so it is considered the main priority in any design in the future. – Mechanical mechanisms have the main priority at the beginning of any new design in the future. – This study allowed us to put the elements of each category in order, so if it becomes difficult to use the most satisfactory element, we can use the one that follow it in order, hence we can maintain customer satisfied. This study tried to focus on as many aspects and K.Ws as possible to get accurate and precise results. Also, it opens the door for other researchers to follow the same method to determine customer satisfaction in more important and complicated products with more aspects 5. References 1. Lanzotti, A., Tarantino, P., 2008. Kansei engineering approach for total quality design and continuous innova- tion. Total quality management journal, vol.20, pp.324-337 2. Mamaghani, N., Rahimian, E., Mortezaei, S., 2014. Kansei engineering approach for consumer’s perception of the ketchup sauce bottle. Scgool of Architecture and Environmental Design, Iran University Science. 3. Mostafa, K., Batool, R., Parvaneh, P., Alireza, A., 2013. Identify and ranking factors affecting bank maskan service quality using kano model. University of Tahran Qom colleage, Tehran, Iran. 4. Nagamachi, M., Tachikaua, M., Imanishi, N., Ishizawa, T., Yano, S., 2008 . A successful statitical procedure on kansei engineering. Total Quality Management journal. 5. Qiting, P., Uno, N., Kubota, Y., 2012 . Kano model analysis of customer needs and satisfaction at the Shanghai Disneyland. Kyoto University, Kubota, Yoshiaki. 6. Sauerwein E., Bailom F., Matzler K., Hinterhuber, H., 1996. The kano model: how to delight your customers. International working seminar on production economics, Australia. 7. Schutte, S., 2002. Designing feelings into products integrating kansei engineering methodology in product development. Linkoping University SE-58183, Sweden Linkoping. 8. Schutte, S., Eklund, J., Axelsson, J., 2004. Concepts, methods, and tools in kansei engineering. Theoretical issues in ergonomics science, vol. 5, pp. 214-232. 9. Syaifoelida, F., Yahaya, S., Sihombing, H., and Yuhazri, M., 2014. The integration framework of kansei engineering (KE) and kano method (KM) for product development. Proc. Of the international conference on advances in civil structural and mechanical engineering, ACSME. pg. 439 Introduction Methodology Collection of Kansei words: Semantic Differential (SD) scale Importance weighting Relating KE with engineering characteristics (ECs) Analysis of Kano Model Questionnaire Results Grip shape analysis Grip material analysis Telescopic pole material Mechanical Analysis The chosen elements Discussion and Conclusion References