Isograph’s Weibull Module Software
Weibull Life Data Analysis
The Mantua Group provides expert Weibull analysis services within Isograph Availability Workbench — fitting failure and suspension data from your CMMS to statistically rigorous life distributions that drive defensible maintenance interval decisions and regulatory submissions.
- 2-parameter and 3-parameter Weibull
- Goodness of fit and Correlation coefficient
- Suspended / right-censored data handling
- B-Life and P-Parameter calculation
- Automatic distribution selection
- Batch analysis across asset populations
- Direct feed to RCMCost and AvSim
- Weibull probability plot output
- 2P & 3P Weibull Fitting
- Goodness-of-Fit & Correlation Coefficient
- Suspended Data (Right-Censoring)
- Rank Regression (OLS)
- B-Life & P-Parameter Calculation
- Automatic Distribution Selection
- Batch Population Analysis
- RCMCost / AvSim Integration
Integrated since 2009
Implementation
Software Deployed
Professionals on Staff
Why Choose AWB Weibull Analysis
Weibull analysis within AWB transforms raw maintenance history into statistically defensible failure distributions. TMG brings deep methodology expertise — critical for infrastructure asset fleets with incomplete records and regulatory scrutiny.
Goodness-of-Fit & Correlation Coefficient
AWB reports correlation coefficient and goodness-of-fit diagnostics for every Weibull fit, providing an objective measure of how well the chosen distribution describes your data. Critical for defending parameter choices in regulatory submissions and internal investment cases.
2P and 3P Weibull Fitting
Fit two-parameter or three-parameter Weibull distributions to your failure data. The location parameter γ accounts for failure-free periods — essential for assets with installation burn-in or a minimum guaranteed life before the first failure mode activates.
Suspended Data Handling
Correctly account for assets still in service (right-censored observations) using AWB's suspension-adjusted ranking. Suspensions are retained in the analysis rather than discarded, producing parameter estimates that reflect the entire fleet population.
B-Life and P-Parameter Metrics
Compute B10, B50, B90 lives, MTTF and arbitrary P-parameter values (B5, B95, etc.) directly from fitted parameters. These metrics feed directly into RCMCost maintenance interval optimisation and AvSim Monte Carlo failure distributions without re-entry.
Automatic Distribution Selection
AWB ranks candidate distributions (Weibull, Lognormal, Normal, Exponential) by goodness-of-fit and recommends the best statistical representation of your data. Useful when failure mode behaviour isn't known in advance, or when comparing fleet segments with potentially different underlying physics.
Batch Population Analysis
Analyse entire asset populations — transformer fleets, pole networks, insulator strings — segmented by rating, manufacturer or condition grade. Each segment is fitted independently, giving you a clear view of how failure behaviour varies across your asset base.
Training & Methodology Transfer
TMG delivers AWB Weibull training covering software operation, rank regression theory, suspended data handling, distribution selection and goodness-of-fit interpretation. We also develop internal capability through mentored analysis of your own asset data — learning by doing on real problems.
- ISO 55000
- IEC 60300
- AER REPEX Framework
- SAE JA1011
- IEEE C57.104
- AS/NZS 7000
How The Mantua Group Works With You
Every organisation is at a different point in its reliability journey. We match our engagement to where you are — from full hands-on delivery through to training your team to self-sufficiency.
We Do — You Learn
TMG leads the full implementation with your team participating throughout to build genuine capability alongside delivery. Ideal for first-time deployments or when internal resources are stretched.
We Do Together
Our most common model. TMG engineers work alongside your maintenance, operations and engineering teams in structured workshops — combining their asset knowledge with our analytical methodology to produce models your team trusts and owns.
We Train — You Do
For teams building internal capability, TMG delivers structured training covering software operation, methodology, and integration. Available as public courses or dedicated onsite delivery across Australia and the United States.
Independent Review & Audit
TMG provides independent technical review of existing models and regulatory submissions — assessing methodology rigour, data quality and standards compliance. Particularly valuable ahead of AER determinations, investment board presentations or safety audits.
Transform Your Failure Data
Whether you need a first Weibull analysis, defensible distribution fits for a regulatory submission, or your team trained in life data methods — The Mantua Group is ready to help.
Contact Us Today+61 (0) 439 118 714
+1 (330) 294-3744