Section B: Answer ANY THREE (3) questions Question 2 Company \"M-Phone is asked

Question

Section B: Answer ANY THREE (3) questions Question 2 Company "M-Phone is asked to benchmark the plastic casing design of five models of a mobile phone by asking a group of eight people to rate their preference on each design. A indicating a relatively poor design and 10 a relatively good design. The results are shown in Table Q1(a) relatively good desiom Ito 10 is used, with Plastic Rating Result DesignM an 1 Man 2 Man 3 Man 4 Lady 5 Lady 6 Lady 7 Lady 8 10 10 Table Q1(a) i) Which "Signal to Noise" (S/N) methodology would you apply to determine which (2 marks) (i) Based on the methodology you have suggested in part (G), perform a S/N analysis and (8 marks) (2 marks) (4 marks) design should be chosen. determine the plastic casing design that consumers would prefer. (ii) Which design has the highest mean value rating? iv) Compare your answers in parts (i) and (ii) with brief comments. Given: S/N,-10log S/Na -10log-X rt S/N-10log r-T n-1

Explanation / Answer

3) mean value rating is nothing but the simple average of all ratings for the given devices. In this case, it can be easily made out that design 2 has the highest value rating

4) According to chosen S/N model, 3 is better design than 2 because it depends on the reciprocal of the squares of individual ratings and therefore any design which is consistently rated high will have higher value then overall mean rating.

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