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Assess software quality maturity by defining the decision and scope, selecting a model that measures the right subject, collecting evidence of work as it is actually performed, comparing that evidence with the model’s criteria, and prioritizing improvements. First distinguish product quality—the qualities of a software product—from process maturity—how consistently an organization creates, tests, and maintains it. A product-quality checklist alone cannot establish process maturity.

Decide what you are assessing

Start with the decision the assessment must support. It may be an internal improvement effort, a check that practices suit a requirement, or an evaluation of a supplier’s processes against a contract. Then set boundaries: which products, teams, lifecycle stages, and quality practices are included, and which are not.

ISO/IEC TS 33010:2023 provides guidance on assessment purposes and selecting assessment models, documented processes, and instruments. Its publication page lists the document as published and under review; confirm its status if that matters to your assessment. ISO/IEC TS 33010:2023

Separate product quality from process maturity

These are related but different questions. Product quality concerns characteristics of the software or ICT product. Process maturity concerns organizational ways of working and how they are managed and improved. IEC describes ISO/IEC 25010:2023 as applicable to ICT and software product quality: “This document defines a product quality model, which is applicable to ICT (information and communication technology) products and software products.” Use it to specify, measure, and evaluate product-quality characteristics—not as a stand-alone organizational maturity assessment. IEC’s ISO/IEC 25010:2023 page

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For process reference models, assessment models, and maturity models, ISO/IEC 33004:2015 sets requirements. ISO lists it as confirmed current in 2026. The two standards therefore serve different purposes: a product-quality model helps assess the product; a process model helps assess how work is carried out. ISO/IEC 33004:2015

Choose a model that fits the question

There is no universally best model established by these sources. Choose based on the assessment subject and intended use, then check the model’s scope, criteria, evidence expectations, rating method, and any formal assessor requirements.

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Assessment need Relevant reference What it addresses
Evaluate software or ICT product qualities ISO/IEC 25010:2023 Product-quality characteristics; it is not an organizational process-maturity method.
Assess processes or maturity using a process model ISO/IEC 33004:2015 and ISO/IEC TS 33010:2023 Requirements for process reference, assessment, and maturity models; guidance for performing process assessments and selecting models and instruments.
Assess software testing processes specifically TMMi A testing-focused staged model. The Foundation describes it as complementing CMMI with more detailed support for software and system testing.

When TMMi may fit

The TMMi Foundation describes progression from ad hoc and unmanaged testing practices through managed, defined, and measured stages to optimization. Its assessment method compares process-area goals and practices with current practices, with results intended to identify strengths, weaknesses, risks, and improvement opportunities and produce an organization-specific plan. This is the Foundation’s description, not an independent comparison of models. Model aims and objectives · TMMi assessment method

The Foundation says the TMMi model is freely available, while its TMMi Assessment Method is licensed for accredited assessors and lead assessors. Check current method and assessor requirements before arranging a formal assessment. TMMi Foundation

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Run the assessment with evidence

  1. Write down the purpose and boundaries. Record the decision to be made, the teams and work in scope, and any relevant contract or requirement. Keep exclusions visible so readers do not mistake a bounded assessment for an organization-wide finding.
  2. Select the reference and method. Match product-quality questions to a product model, process questions to a process assessment or maturity model, and testing-process questions to an appropriate testing model. Verify that the criteria and instruments cover the lifecycle and practices you intend to assess.
  3. Gather evidence from work as performed. Review artifacts and records, observe practices, and ask people across teams how the work is actually done. Look for evidence that practices are repeated and supported, that teams use a defined approach where appropriate, and that measures inform decisions. This is a practical evidence-gathering approach, not a universal checklist mandated by every model.
  4. Compare evidence to model criteria. Record which expectations are demonstrated, partly demonstrated, or unsupported, and retain the evidence behind each judgment. For TMMi, process-area goals and practices are the comparison criteria described by its assessment method.
  5. Translate gaps into a small improvement portfolio. Choose changes linked to business needs and measurable outcomes, assign owners, and set a time to revisit the evidence. Assessment should lead to decisions and follow-up, not just a maturity label.

Use measures carefully

Match measures to the business decision and chosen model. Relevant evidence may concern process performance, process-quality indicators, test processes, and product quality. There is no universal metric set prescribed for every organization in the cited material.

A high test count or a single defect metric is not, by itself, proof of maturity. Explain what each measure covers, how it is interpreted, and what it leaves out. Do not infer a guaranteed defect reduction, delivery-speed improvement, or return on investment from a maturity level.

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The TMMi Foundation reports that 88% of TMMi users in its survey said they experienced benefits in effectiveness or product quality, and 77% reported benefits in test efficiency. The page does not state the survey year, sample size, date, or independent verification. Treat these as Foundation-reported survey findings, not proof that adopting TMMi causes those outcomes. TMMi Foundation, Model Aims and Objectives

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Turn findings into priorities

Prioritize gaps by their connection to business risk and desired outcomes, not by the appeal of achieving a higher label. A useful improvement item names the observed gap, the evidence behind it, an accountable owner, the change to be made, and the evidence that will show whether the change worked. Reassess after implementation using the same scope and criteria where possible; if either changes, document that so results remain interpretable.

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Or skip the browser setup

If you need to capture screenshots of software quality evidence—such as a dashboard or test report—ScreenshotNeo can return an image or PDF through one GET request. Its API accepts or dismisses cookie-consent banners and removes more than 60 known consent platforms, newsletter popups, and chat widgets before capture; those steps can each be turned off. Bot checks/CAPTCHAs, blank pages, timeouts, failed loads, and cache hits are not billed, and response headers indicate the page verdict and billing status. It also offers an MCP server with tools for AI agents, including Claude, Cursor, and other MCP clients.

For example, save a screenshot of a dashboard page as WebP:

curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.com/dashboard -o shot.webp

See the ScreenshotNeo API documentation for request options. The free plan includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000. Sign up for free.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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