Stochastic Differential Equation-Based Flexible Software Reliability Growth Model

Table 2

(a) Parameter for DS-I (Brooks DS-2 1301 faults)

Models under comparisons	Parameter estimation
	𝑎	𝑏1	𝑏2	𝑏3	𝛽	𝑝1	𝑝2	𝑝3	𝜎1	𝜎2	𝜎3
Proposed SRGM	1339	.089	.248	.251	48	.264	.669	.067	.194	.001	.111
Generalized Erlang model [1, 8]	1453	.376	.000	.165	—	.011	.000	.989	—	—	—

(b) Parameter for DS-I

Models under comparison	Comparison criteria
	𝑅^2	MSE	Bias	Variation	RMSPE
Proposed SRGM	1.00	81.3734	−0.06975	9.20469	9.204957
Generalised Erlang model [1, 8]	.994	1200.522	0.939148	35.14148	35.15403