Design evaluation of digital consumer products using virtual reality-based functional behaviour simulation

Figures & data

Figure 1. Architecture of the VR-based product design evaluation.

Figure 2. Key components of the proposed approach and their relations.

Figure 3. RE-based geometric model creation: (a) scanned data at multiple views; (b) single triangular mesh; (c) final geometric model.

Figure 4. Examples of graphical images used for LCD display of the MP3 player.

Figure 9. VP model for the MP3 player at four different states: (a) MP3 play; (b) mode select; (c) FM radio; (d) hold; and (e) VR-based product design evaluation.

Figure 5. State transition.

Figure 6. State transition chart of an MP3 player.

Figure 7. Control flow of the finite state machine.

Figure 8. VR-based operations for product design evaluation.

Figure 10. VP model for the game phone at four different states: (a) on; (b) calling; (c) multimedia menu; (d) movie; and (e) VR-based product design evaluation.

Figure 11. 2D screen prototypes: (a) MP3 player and (b) game phone.

Figure 12. Graphical plots of task performance measures for (a) the MP3 player and (b) the game phone.

Table 1. Task descriptions and performance measures.

			Average time required (s)
Product type	Task	Task steps	2DSCR	3DSCR	3DSTR	REAL
MP3 player	(T1) Play the third MP3 music with volume level 30	Turn the MP3 player on.	6.5	5.2	5.9	5.3
		Play the music.
		Move to the third music.
		Increase the volume up to 30 levels.
		Hold on the buttons (move ‘hold’ slider to the right).
	(T2) Play the second FM radio station with volume level 20	Hold off the buttons (move ‘hold’ slider to the left).	8.8	7.3	8.1	7.5
		Enter the menu.
		Select the FM radio submenu to play FM radio.
		Move to the second FM radio station.
		Decrease the volume down to 20 levels.
Game phone	(T3) Make a call to the first tester	Turn on the game phone.	10.0	6.7	7.7	6.4
		Enter the phone number using number buttons.
		Press ‘call’ button.
	(T4) Play an animation	Enter the main menu.	9.5	6.4	7.3	6.7
		Move to the multimedia submenu (press ‘6’ button).
		Select the second bin for animation files.
		Play the animation by pressing ‘OK’ button.
	(T5) Change the caller ring into the third one	Enter the main menu.	9.0	5.8	6.6	5.6
		Move to the caller ring submenu (press ‘2’ button).
		Select the third one.
		Set it to the current caller ring by pressing ‘OK’ button.
	(T6) Send a message ‘hi’ to the second tester	Press ‘message’ button to enter the message menu.	20.3	14.0	15.0	13.0
		Enter the phone number.
		Press ‘OK’ button.
		Enter the message ‘hi’ using 12 buttons *, #, 0∼ 9).
		Press ‘OK’ button to send the message.

Figure 13. Graphical plots of questionnaire results for (a) all subjects and (b) five subjects with experiences of using HMD.

Table 2. Questionnaire contents (translated from Korean).

Q1	Can you understand the product functions by using the virtual prototype?
Q2	Is it easy to click buttons when using the virtual prototype?
Q3	Does the virtual prototype look like the real product?
Q4	Can you figure out the size of the product with the virtual prototype?
Q5	Can you feel a three-dimensional effect when using the virtual prototype?
Q6	Is the display of the product legible?
Q7	Do you think the use of virtual prototype interesting?
Q8	Does the virtual prototype offer enough information for a decision to buy the product?