Table 4. Modified psychophysical Harrington's scale of quality and results of risk-based desirability function approach.

#	Intervals in global desirability (D-global)	Quality, descriptive evaluation	Number of products in each quality scale (percentage)
1	0.90–1.00	Excellent	14 (13%)
2	0.80–0.90	Good	24 (23%)
3	0.70–0.80	Acceptable	38 (36%)
4	0.37–0.70	Low*	29 (27%)
5	0.00–0.37	Bad*	1 (1%)

*Unacceptable qualities.