: (Formerly Portability) The degree of effectiveness and efficiency with which a system can be adapted for different hardware, software, or other operational environments.

The first step in your is acquiring the correct, up-to-date version (the latest is ISO/IEC 25010:2011, though a 2023 amendment exists for System/Software product quality requirements). Important: ISO standards are not free (unless you have an institutional license). Here is how to get the PDF:

| Attribute | Details | |-----------|---------| | | ISO/IEC 25010:2011/Amd 1:2023 – Systems and software engineering — Systems and software Quality Requirements and Evaluation (SQuaRE) — Product quality model | | Pages | ~34 pages (main body) + annexes | | PDF Cost | CHF 158 (~$180 USD) from ISO store | | Copyright | Strict – no free distribution | | Structure | Clauses 1–8 + Annexes A (quality in use), B (relationship to ISO/IEC 25012 for data quality), C (mapping to ISO/IEC 9126) |

: Compare different software products or versions using a consistent set of criteria recognized globally. Accessing the Document

Many freely available PDFs online are outdated drafts. The official version includes 2023 amendments (e.g., security subcharacteristics refined).

| Gap | Impact | |-----|--------| | No example metrics | Cannot directly use for scoring without ISO/IEC 25023 | | No assessment process | Requires ISO/IEC 25040 (evaluation reference model) | | Ambiguous “user error protection” vs “operability” | Leads to interpretation conflicts during certification | | Accessibility subcharacteristic (added in 2023) lacks references to WCAG | Outdated for web apps |

: Purchase the PDF + Redline version (shows changes from previous standard) if you maintain legacy systems documented against ISO 9126.

Based on practical reading of the PDF: