Application Examples for RGA
We have compiled some case studies to demonstrate the types of analyses that you will be able to perform with ReliaSoft's RGA. Some of the many useful applications include the ability to:
- Quantify reliability growth and determine the feasibility of achieving reliability goals with a given test/fix strategy.
- Calculate optimum overhaul times and other results for fielded repairable systems without the detailed data sets that would normally be required for repairable system analysis.
We have compiled some case studies to demonstrate the types of analyses that you will be able to perform with RGA. For the actual case studies, the data and/or exact test method that were used may have been modified in cases where the actual information was deemed to be confidential.
Simple MTBF Determination
This example looks at MTBF determination using system failure data that have been collected on five helicopters during the final test phase.
Working with Grouped per Configuration Discrete (Success/Failure) Data
This example examines the analysis of a "one-shot" system undergoing reliability growth development testing during which different tests are performed on different design configurations.
Developmental Testing with Corrective Actions Implemented During the Test and Delayed Fixes
This example is based on the paper An Extended Reliability Growth Model For Managing And Accessing Corrective Actions by Dr. Larry Crow, presented at the 2004 RAMS. It examines developmental testing on a product during which identified failures are corrected, ignored or delayed.
Fielded Systems Analysis
In this example, the purpose of the analysis is to project the improvement in a system based on the implementation of planned fixes for some failure modes. This example is based on the data from 22 fielded systems. All systems have a start time of 0, and the final failure time for each system is considered to be the system's end time.
Analyzing Software Reliability Growth
This example examines a typical software reliability growth scenario.
Multi-Phase Planning and Analysis
This example presents three features within RGA 7 — the Crow Extended - Continuous Evaluation model, the Growth Planning Folio and the MultiPhase plot — and how they can be combined to conduct a reliability growth analysis.
This example illustrates how to use the Mission Profile Folio to group times-to-failure data based on specified convergence points. This strategy can help to achieve more balanced results from analysis with the Crow Extended model.