Because Whispr is a wearable device, there are numerous failure modes. A failure mode and effects analysis was performed to identify areas of concern relating to the electronics, structure, attachment methods, comfortability, and user interaction.
Due to time limitations in this semester, risks need to be prioritized before being addressed. The highest risk factor is if the head straps catch and tangle the user's hair. If the user were to get their hair tangled in the device, they would experience discomfort. To address this, the method of attachment needs to limit pinch points and the material needs to be unable to stick to hair.
Next, if the attachment mechanism between the interior and exterior gets loose, it could fall off. This could cause damage to Whispr or to the user and their environment. This is addressed by giving feedback such that the user knows it is connected. Haptic feedback such as a click or snap will let the user know it is secure.
The third highest risk is if the battery fails. This could endanger the user but is fairly unlikely to occur. The battery health will need to be detectable to minimize this risk.
Table B. FMEA Diagram