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Table 1 Information content analysis based on the new hybrid axiomatic design methodology

From: New Hybrid AD Methodology for Minimizing the Total Amount of Information Content: A Case Study of Rehabilitation Robot Design

  DP12
Alternative solutions The final relevance index Information content (Recognition accuracy)
Image processing Wearable sensor Photo-electric sensor Surrounding environment perception Tension sensor
FR12
 FR121: Gait detection Image processing X 0.54 0.35    0.234
Wearable sensor   X 0.68    0.136
Photoelectric sensor    X    0.322
 FR122: Fall detection Image processing X 0.5 − 1 0.42 0.62 0.12
Wearable sensor   X − 1 0.45 0.82 0.089
Photoelectric sensor    X − 1 0.82 0.415
Surrounding environment perception     X 0.35 0.252
Tension sensor      X 0.184
 FR123: Detecting the training time Image processing X 0.42 − 1 − 1   0.252
Wearable sensor   X 0.42 0.3   0.029
Photoelectric sensor    X − 1   0.007
Surrounding environment perception     X   0.515
 FR124: Detecting the number of steps Image processing X 0.42 0.56 −1   0.515
Wearable sensor   X 0.78 0.76   0.089
Photoelectric sensor    X 0.64   0.007
Surrounding environment perception     X   2.32
 FR125: Detecting the patient’s walking speed Image processing X 0.42 0.52 0.32   0.252
Wearable sensor   X 0.42 0.3   0.515
Photoelectric sensor    X 0.25   0.007
Surrounding environment perception     X   2.32