Stochastic Differential Equation-Based Flexible Software Reliability Growth Model

Table 4

(a) Parameter for DS-III

Models under comparisons	Parameter estimation
	𝑎	𝑏1	𝑏2	𝑏3	𝛽	𝑝1	𝑝2	𝑝3	𝜎1	𝜎2	𝜎3
Proposed SRGM	215	.189	.135	.113	8	.220	.640	.140	.328	.072	.346
Generalised Erlang model [1, 8]	195	.063	.011	.075	—	.212	.004	.784	—	—	—

(b) Parameter for DS-III

Models under comparison	Comparison criteria
	𝑅^2	MSE	Bias	Variation	RMSPE
Proposed SRGM	.998	5.88010	0.070583	2.541294	2.54227
Generalised Erlang model [1, 8]	.997	7.95905	0.149816	2.84224	2.84618