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 5

Device score model: for all criteria (lower is better).

Ergonomics		Smartphone	Tablet	Headset	AR-Mic.	AR-Gest.	Proj.-Mic.	Proj.-Gest.
Overall grade		2,4	3,4	3,0	3,2	3,2	3,1	2,9
Criterion	Weight.	Grade	Grade	Grade	Grade	Grade	Grade	Grade
hands-free	30%	3,5	3,5	1,0	1,0	1,0	1,0	1,0
weight	15%	2,2	6,0	1,2	1,8	1,6	1,2	1,0
size	15%	3,0	6,0	2,0	3,0	3,0	2,0	1,0
interaction distance	5%	3,5	3,5	2,3	2,3	2,3	3,5	3,5
interaction safety	35%	1,0	1,0	6,0	6,0	6,0	6,0	6,0
Performance		Smartphone	Tablet	Headset	AR-Mic.	AR-Gest.	Proj.-Mic.	Proj.-Gest.
Overall grade		1,7	1,9	2,8	1,7	3,5	4,4	5,8
Criterion	Weight.	Grade	Grade	Grade	Grade	Grade	Grade	Grade
Type I	20%	2,1	2,6	3,2	1,0	3,8	3,5	6,0
Type II	30%	1,3	1,4	1,0	2,6	5,2	4,4	6,0
User error rate	40%	1,5	1,9	3,7	1,6	1,0	4,5	6,0
Motivation	10%	3,4	1,9	3,5	1,0	2,2	6,0	4,0
Technical acceptance		Smartphone	Tablet	Headset	AR-Mic.	AR-Gest.	Proj.-Mic.	Proj.-Gest.
Overall grade		1,7	1,1	5,0	3,3	2,0	5,1	4,4
Criterion	Weight.	Grade	Grade	Grade	Grade	Grade	Grade	Grade
Useful	14%	1,0	1,1	3,1	2,4	2,2	4,2	6,0
User friendly	14%	1,1	1,0	4,4	1,8	2,0	6,0	5,0
Self-explaining	14%	2,6	1,0	4,7	3,1	3,1	4,0	6,0
Representation	14%	2,9	1,0	6,0	3,2	1,8	5,0	3,8
Health care	14%	1,0	1,1	5,6	5,0	2,1	6,0	2,2
Input quality	14%	2,0	1,0	5,3	2,2	2,0	6,0	5,7
First impression	14%	1,4	1,6	6,0	5,3	1,0	4,4	2,4
Technology skills	0%	2,5	1,2	4,8	3,3	4,8	6,0	1,0
User Experience		Smartphone	Tablet	Headset	AR-Mic.	AR-Gest.	Proj.-Mic.	Proj.-Gest.
Overall grade		2,7	2,3	1,8	3,2	6,0	1,7	2,6
Criterion	Weight.	Grade	Grade	Grade	Grade	Grade	Grade	Grade
HQ identity	25%	1,6	1,5	1,0	5,0	6,0	1,2	3,4
HQ stimulation	25%	3,7	3,2	2,7	1,0	6,0	3,4	2,5
Pragmatic quality	25%	3,5	3,5	2,7	4,2	6,0	1,0	2,6
Attractivity	25%	2,0	1,1	1,0	2,4	6,0	1,4	1,9