A Data-Driven Customer Quality of Experience System for a Cellular Network

Table 2

Selection of rules for derived variables.

	Pattern	Complaint call rate	Complaint call rate	Ratio
		Matching pattern	No pattern
Rule  1	2 consecutive points higher (or lower) than	0.53	0.27	1.963
Rule  2	4 consecutive points out of five higher (or lower) than	0.13	0.08	1.625
Rule  3	1 point higher (or lower) than	0.13	0.12	1.083
Rule  4	6 consecutive increasing/decreasing points	0.17	0.16	1.063
Rule  5	8 consecutive points out of	0.31	0.32	0.969
Rule  6	9 points higher (or lower) than average	0.25	0.27	0.926
Rule  7	14 consecutive alternating points	0.29	0.32	0.906
Rule  8	15 consecutive points out of	0.18	0.21	0.857