Acronyms
OSS	Open Source Software
NHPP	Non Homogenous Poisson Process
SPSS	Statistical Package for Social Sciences
SRGM	Software Reliability Growth Model
Notations
t	Time
y/p	Potential number of bugs lying dormant in the software that can be fixed over a long run
y1/p1	Number of independent bugs
y2/p2	Number of dependent bugs
x(t)	Mean value function of bug detection/fixed up to time t
x1(t)	Mean value function of the expected number of independent bugs
x2(t)	Mean value function of the expected number of dependent bugs
g/k	Rate of bug detection/fixed
r/l	Rate of bug detection/fixed of independent bugs
c/d	Rate of bug detection/fixed of dependent bugs
θ(t)/θ(H(t))	Delay–effect factor i.e., debugging time lag
ψ	Inflection factor
q	Proportion of the independent bugs
β	Constant and >0
H(t) or H(t)	The value of summary/comment entropy at time t be consistent writing H or H
x(H(t))	Bugs removed by cumulative entropy value H(t)
δ	Constant and >0