CMMI Maturity Level 5
CMMI Maturity Level 5 (Optimizing) appraisal
An appraisal of whether your organisation manages processes with data and improves them against measured objectives.
- Rating valid
- 3 years
- Method
- Benchmark
- Published on
- CMMI PARS
Accredited and empanelled
What is CMMI Maturity Level 5?
CMMI Maturity Level 5, Optimizing, is the highest rating in the CMMI model. It is awarded to organisations that set quantitative objectives for quality and process performance, understand the variation in their processes, and choose and confirm improvements using data.
Level 5 builds on the high maturity practices first required at Level 4, Quantitatively Managed, such as process performance baselines and models. Appraisals use the CMMI Institute's Benchmark method under CMMI V3.0 and must be led by a lead appraiser certified by the CMMI Institute for high maturity appraisals.
The result is a maturity level rating for the appraised organisational unit, published on the Published Appraisal Results System (PARS) and valid for three years. Because high maturity claims attract close attention from buyers, the appraisal looks hard at whether the statistics are used to make real decisions.
Who it is for
- Large software and IT services organisations already rated at Level 3
- Global delivery centres competing for long-term outsourcing contracts
- Engineering organisations with mature measurement programmes
- Suppliers to buyers in aerospace, defence or financial services that ask for high maturity
- Managed service providers running high-volume, repeatable services
What sets audit time and cost
The Benchmark appraisal itself typically takes one to two weeks; organisations need enough stable process data to support baselines and models, so readiness reviews usually start many months ahead.
- Size of the organisational unit and number of projects or services
- Model views in scope
- Volume and quality of process performance data to review
- Number of locations and delivery centres
- Appraisal team size and duration
- Readiness reviews of high maturity practices before the appraisal
Why it matters
What CMMI Maturity Level 5 gives you
- 01
The highest published rating
A Level 5 result on PARS signals to buyers that delivery is managed quantitatively, not only by procedure.
- 02
Predictable performance
Process performance baselines and models let you forecast quality and schedule outcomes with known confidence.
- 03
Improvements backed by data
Changes are selected and checked against measured results, so effort goes into improvements that work.
- 04
Fewer repeated problems
Causal analysis addresses the root causes of defects and problems so they do not recur across projects.
The audit
What our auditors examine
- 01
Quality and process performance objectives
Measurable objectives derived from business needs, and how projects set and track their own objectives against them.
- 02
Process performance baselines and models
Whether baselines rest on sound data, how variation is understood, and whether models are used to predict outcomes.
- 03
Statistical management of subprocesses
Use of statistical techniques to monitor selected subprocesses and act when performance falls outside expected limits.
- 04
Causal analysis and resolution
How root causes of significant defects and outcomes are analysed, and how the resulting changes are evaluated.
- 05
Selecting and deploying improvements
How improvement proposals are chosen, piloted, rolled out and measured across the organisational unit.
- 06
Level 3 foundations
Continued evidence that defined processes, training and quality assurance remain in place beneath the high maturity practices.
How the appraisal runs
Benchmark appraisals follow the CMMI Institute’s method, led by a certified lead appraiser.
01
Planning
The lead appraiser agrees the model, maturity level, organisational unit and sampled projects with your appraisal sponsor.
02
Readiness review
A readiness review checks that evidence and participants are in place before the appraisal is scheduled.
03
Benchmark appraisal
The appraisal team examines evidence and interviews practitioners across the sampled work to rate practice areas.
04
Results
The maturity level rating is presented to the sponsor and submitted to the CMMI Institute, which publishes it on its results system.
Related standards and audits
Often certified or audited alongside this one, sometimes in a single combined audit.
CMMI appraisals
CMMI Maturity Level 3
An independent appraisal of whether your organisation's standard processes are defined and followed across projects.
ISO certification
ISO 9001
Independent assessment of your quality management system against ISO 9001:2015, by an accredited certification body.
ISO certification
ISO 20000-1
Independent certification that your services are planned, delivered and improved under a managed service management system.
ISO certification
ISO 27001
Independent certification of your information security management system against ISO/IEC 27001:2022.
CMMI Maturity Level 5 questions
We audit; we do not consult.
To keep appraisals independent, we never design, build or fix the systems we audit, and decisions are made by people who did not take part in the audit. Read our impartiality policy.
Plan your CMMI Maturity Level 5 appraisal
Tell us your scope, sites and timeline. We reply with an audit plan and a fixed quote.