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Defect Density Prediction
Software reliability expert in a box
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Software reliability predictions
- Are your customers requiring you to address software reliability during the proposal
phase?
- Do you need to address software reliability during the proposal phase to be competitive?
- Have your customers established software reliability objectives for their delivered
products?
- Do you have suppliers that are in need of guidelines for delivering reliable software?
- Are you in the process of writing a statement of work pertaining to the reliability of
delivered software to your organization?
If any of these are true, we can work with you to address software reliability measurement
requirements during the pre-proposal, proposal, concept and development phases. The
techniques available for measurement are:
The software reliability prediction process
The below illustrates the process for predicting software reliability.
Firstly the survey must be completed. This is part of the
"initial software reliability assessment" service.
Then the size is predicted which facilitates the prediction of the defects
during and after testing. These tasks are part of the
"detailed software reliability assessment" service. From there
the prediction tasks begin. These are shown in blue.
Get a real software reliability prediction report - this organization was developing defense software
and needed to determine whether the system reliability objective would be met by
the software
Key Benefits
- Predict the defect levels, MTTF, failure rate and reliability before the coding and
testing begins
- Use the results to drive development practices to achieve
a specific goal instead of being surprised by an unacceptable reliability
level later when it's more expensive to address
- Use the results to determine the key development practices that have the highest return
on investment
- Determine person power needed to support the desired or required reliability
requirements
- A completed report and/or proposal for your customer
- This method is also automated in Frestimate
Capabilities
The owner of SoftRel has 20 years of experience in measuring software reliability and
in developing proposals or statement of work documents specifying software reliability
objectives.
- Ann Marie Neufelder is the author of a SEMATECH industry software reliability standard.
Deliverables
- Includes an initial software reliability assessment.
- Predicted defects and defect density at start and end of testing as well
as any time during useful life
- Key milestones are start of test, end of test, average during useful life,
end of useful life (point at which software version is replaced with a new
major software version
- Predicted failure rate, critical failure rate, MTTCF, MTTF, availability and reliability
- Predicted staff required to fix residual defects each month after delivery
- Predicted staff required to test the software to reach a desired level of defect density
at delivery
- Determine where software failure rates and components will be merged into the overall
system reliability block diagram
- All of the above predictions are completed for 4 milestones
- Start of test
- End of test (deployment)
- Average useful life
- End of useful life (point at which software version is replaced with
next major software version)
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