Stochastic Differential Equation-Based Flexible Software Reliability Growth Model

Table 3

(a) Parameter for DS-II (Misra 231 faults)

Models under comparisons	Parameter estimation
	𝑎	𝑏1	𝑏2	𝑏3	𝛽	𝑝1	𝑝2	𝑝3	𝜎1	𝜎2	𝜎3
Proposed SRGM	420	.059	.104	.378	66.593	.64	.342	.018	.048	.185	.599
Generalised Erlang model [1, 8]	561	.022	.012	.041	—	.64	.342	.018	—	—	—

(b) Parameter for DS-II

Models under Comparison	Comparison criteria
	𝑅^2	MSE	Bias	Variation	RMSPE
Proposed SRGM	.998	7.22	−0.7104	2.626231	2.720631
Generalised Erlang model [1, 8]	.995	22.09	0.6943	4.711796	4.762687