beets

URL = https://github.com/beetbox/beets
This is estimation of issues occurence for beets of user beetbox.

Info:

Estimated at 16.1.2019 19:07:40.

Initial number of total defects = 3 091
Total defects in repository after processing and filtering = 227

Filters and Processors:

Filters:
- FilterByLabel used, with filtering words: [bug, error, fail, fault, defect]
- FilterClosed used to filter out opened issues.
Processors:
- None

Trend test:

Trend exists .
Trend = -5.442990220702583

Time between failures

Comparison of 5 models:

Goel-Okemura model

Model function:
μ(t) = a * (1 - e-b*t)
Estimated parameters:
a = 326.74803787957336
b = 0.0042470257150898
Estimated by Least Squares.

Goodness of fit:

Chi-Square = 512.2033248353434
Chi-Square significance level = 1.3261614029147495E-10%
Chi-Square null hypothesis rejection = REJECT

Goel-Okemura S-Shaped model

Model function:
μ(t) = a * (1 - (1 + b*t) * e-b*t)
Estimated parameters:
a = 326.74803787957336
b = 0.0042470257150898
Estimated by Least Squares.

Goodness of fit:

Chi-Square = 9170.224170458785
Chi-Square significance level = 0.0%
Chi-Square null hypothesis rejection = REJECT

Hossain-Dahiya model

Model function:
μ(t) = a * (1 - e-b*t) / (1 + c*e-b*t)
Estimated parameters:
a = 233.30837500239468
b = 0.015288879071952
c = 3.0322848585694753
Estimated by Least Squares.

Goodness of fit:

Chi-Square = 491.80921577257067
Chi-Square significance level = 7.849310090790595E-9%
Chi-Square null hypothesis rejection = REJECT

Musa-Okumoto model

Model function:
μ(t) = α * ln(β * t + 1)
Estimated parameters:
α = 233.30837500239468
β = 0.015288879071952
Estimated by Least Squares.

Goodness of fit:

Chi-Square = 783.4649147591084
Chi-Square significance level = 0.0%
Chi-Square null hypothesis rejection = REJECT

Duane model

Model function:
μ(t) = α * tβ
Estimated parameters:
α = 3.720251773085423
β = 0.7346555523411451
Estimated by Least Squares.

Goodness of fit:

Chi-Square = 569.4460352074645
Chi-Square significance level = 0.0%
Chi-Square null hypothesis rejection = REJECT

Failure occurence