The Assessment and Foundation of Bell-Shaped Testability Growth Effort Functions Dependent System Testability Growth Models Based on NHPP

Table 3

Estimated parameters values and model comparisons for DS.

STGMs				AE (%)	MSE	MRE
EX-STGM	114.39	0.0046	0.0090	33.1	—^*	0.3156
RA-STGM	95.60	0.0068	0.0076	11.16	83.91	0.1623
LO-STGM	87.35	0.0096	0.0070	1.57	85.51	0.1063
DS-STGM	101.30	0.0059	0.0080	17.79	90.09	0.2213
IS-STGM	90.66	0.0081	0.0071	5.42	86.13	0.1226

The symbol “—” indicates that the value is too large to characterize the MSE.