As an upgrade of the 217Plus™ method, 217Plus™:2015 provided several new component models, updates to model data, and refinements of several model equations. For Notice 1, the original software reliability prediction model has been replaced with the Neufelder Model for software reliability prediction as defined in IEEE Standard 1633-2016 “IEEE Recommended Practice on Software Reliability”. It is recommended that the user obtain a copy of the new 217Plus™:2015, Notice 1 Handbook for detailed information on these models, the model development background, and associated reference tables and equations. To take full advantage of the Neufelder Model within 217Plus™:2015, Notice 1, you will need to purchase a copy of IEEE Standard 1633-2016 “IEEE Recommended Practice on Software Reliability” from IEEE or an authorized distributor (Quanterion does not sell IEEE Standard 1633-2016). Quanterion also provides product support to all registered users of the original 217Plus™ or 217Plus™:2015 Calculators.
According to the 217Plus™ ‘System Model’ for an assembly, the assembly failure rate is a function three major elements:
- The summarized failure rates of all hardware components of the assembly/system;
- A Process Grade Factor (PGF) multiplier/accelerant, applied to the hardware summary, and
- An additive Software failure rate term, when applicable.
Using this Calculator, each of these values may be calculated for a system of up to ten (10) hardware assemblies and fifteen (15) software assemblies.
The Neufelder Assessment Model correlates more 156 software development practices to defect density which are matrixed to the Quanterion Solutions HDBK-217Plus™: 2015, Notice 1 process grade factors.
Click Here to visit the Neufelder Assessment Model (You will be brought to an external website).
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