Designing a Human Machine Interface for Quality Assurance in Car Manufacturing: An Attempt to Address the “Functionality versus User Experience Contradiction” in Professional Production Environments

Table 4

Device score model: results overview (the lower the better).

DEVICE SCORE MODEL		Smartphone	Tablet	Headset	AR-Mic.	AR-Gest.	Proj.-Mic.	Proj.-Gest.
Overall grade		2,1	2,2	3,0	2,6	3,5	3,6	4,2
Criterion	Weight.	Grade	Grade	Grade	Grade	Grade	Grade	Grade
Ergonomics	25%	2,4	3,4	3,2	3,2	3,1	2,9	3,0
Performance	40%	1,7	1,9	1,7	2,9	4,4	5,8	2,8
Technology acceptance	15%	1,7	1,1	3,3	2,0	5,1	4,4	5,0
User Experience	20%	2,7	2,3	3,2	6,0	1,7	2,6	1,8

AR-Mic = augmented reality: data glasses with microphone as input device.
AR-Gest. = augmented reality: data glasses with hand gesture as input device.
Proj.-Mic. = display instructions over projection with microphone as input device.
Proj.-Gest. = display instructions over projection with hand gesture as input.