| QR Code Standard Compatibility | Support ISO/IEC 18004 QR Code specifications, including common Model 2 symbols and all standard error-correction levels. | Reduces compatibility problems across logistics labels, payment pages, product packaging, tickets, and documentation produced in different markets. | Test symbols generated at different versions, sizes, rotations, colors, and error-correction levels. | ISO/IEC 18004:2024 QR Code specification. |
| Symbol Version and Size Range | Recognize QR Code Versions 1–40, ranging from 21 × 21 to 177 × 177 modules, when image quality is sufficient. | Large symbols can contain more data, while compact symbols are common on small product labels and access cards. | Evaluate small, medium, and high-density symbols at realistic viewing distances and camera resolutions. | QR Code versions and module dimensions defined by ISO/IEC 18004. |
| Data Capacity Handling | For Version 40 at the lowest error-correction level, theoretical maximum capacity is approximately 7,089 numeric characters, 4,296 alphanumeric characters, 2,953 bytes, or 1,817 Kanji characters. | Helps buyers determine whether the reader can process long URLs, serial data, shipment information, or multilingual content. | Use numeric, alphanumeric, binary, and Kanji test payloads rather than testing URLs only. | Capacity limits vary by QR version, mode, and error-correction level under ISO/IEC 18004. |
| Damage and Obstruction Recovery | Correctly decode partially damaged symbols using selectable error correction: approximately 7% (L), 15% (M), 25% (Q), or 30% (H) restoration capability. | Packaging may be scratched, folded, dirty, or partly covered by stickers during international transport. | Test printed symbols with controlled scratches, blur, folds, and partial obstruction. Record successful scans and failure conditions. | Error-correction percentages are approximate design capabilities, not guaranteed scan-success rates. |
| Lighting and Image Robustness | Maintain reliable decoding under low light, glare, uneven illumination, mild motion blur, and perspective distortion. | Warehouse, retail, customs, and outdoor environments rarely provide identical lighting conditions. | Use a repeatable test set with glossy labels, matte labels, backlighting, shadows, and angled scans. | Performance depends on camera hardware, focus, exposure, symbol contrast, and reader algorithms. |
| Symbology Coverage | Support required 2D and 1D formats in addition to QR Code, such as Data Matrix PDF417 Aztec EAN/UPC Code 128 | International supply chains frequently combine retail, transport, healthcare, manufacturing, and customs barcode formats. | Prepare one verified sample for every symbology required by the buyer’s operation and confirm output accuracy. | Format availability differs by reader; confirm the exact supported symbology list before purchase. |
| GS1 and Structured Data Support | Correctly preserve application identifiers, FNC1-related data, and GS1 Digital Link URI content where required. | Structured identifiers support product traceability, batch information, expiry dates, and item-level inventory workflows. | Test valid GS1 samples and verify that identifiers, separators, dates, quantities, and serial numbers are not altered. | GS1 General Specifications and GS1 Digital Link standards. |
| Character Encoding and Localization | Accurately handle UTF-8 text, percent-encoded URLs, accented characters, Asian scripts, and right-to-left language content. | Global buyers need consistent results across multilingual packaging, websites, invoices, and product records. | Scan equivalent payloads in several writing systems and compare the decoded text byte-for-byte with the source data. | QR encoding mode and payload interpretation must be validated by the receiving application. |
| URL Safety and User Control | Show the destination before opening it, display the complete domain, and avoid automatically executing links or actions. | QR codes can direct users to phishing pages, malicious downloads, or unexpected payment requests. | Test ordinary URLs, internationalized domains, shortened links, redirects, and non-HTTP payloads in a controlled environment. | Security behavior is a product feature; scanning a code should not be treated as proof that its content is trustworthy. |
| Offline Operation and Privacy | Decode locally without an internet connection when online services are not required; provide clear controls for scan history, analytics, and permissions. | Offline operation benefits warehouses, travel locations, restricted facilities, and buyers handling sensitive inventory data. | Enable airplane mode, scan local test codes, inspect network activity, and review data-retention settings. | Offline decoding is distinct from opening a scanned URL, which may require internet access. |
| Output and Integration | Provide accurate plain-text output and, where needed, configurable keyboard input, clipboard transfer, CSV/JSON export, or documented API integration. | Integration determines whether decoded data can flow into inventory, point-of-sale, warehouse, customs, or quality-control systems. | Compare exported values with source values, including leading zeros, punctuation, line breaks, and long payloads. | Integration options vary by device, operating system, licensing model, and reader configuration. |
| Operating-System and Device Coverage | Verify support for the buyer’s required mobile, desktop, browser, industrial scanner, and camera configurations. | International teams often use mixed hardware across offices, stores, warehouses, and field operations. | Test the same code set on every target device, operating-system version, camera type, and screen size. | Compatibility should be confirmed against the reader’s current support documentation. |
| Accessibility and Usability | Provide clear focus states, readable text, sufficient contrast, simple controls, audio or vibration feedback where appropriate, and support for assistive technologies. | Improves adoption for users with visual, motor, cognitive, or language-related accessibility needs. | Review the interface using keyboard navigation, screen magnification, screen readers, large text, and high-contrast settings. | Use WCAG 2.2 principles for applicable software interfaces. |
| Scan Speed and Workflow Efficiency | Measure time-to-decode, repeated-scan handling, duplicate suppression, batch mode, and feedback latency under the intended workflow. | A small delay repeated across thousands of scans can significantly affect labor productivity and queue times. | Run a controlled sample of at least 100 scans per use case and report median time, failure rate, and rescans required. | There is no universal scan-speed result; performance must be measured on the buyer’s devices and symbols. |
| Security, Updates, and Governance | Provide documented permissions, secure update procedures, vulnerability-response information, configurable retention, and administrative controls where required. | Readers may process customer, payment, shipment, employee, or regulated product information. | Review the security policy, update history, permission requests, data-processing terms, and enterprise-management options. | Assess against the buyer’s internal security policy and applicable privacy regulations. |
| Total Cost and Deployment Fit | Compare license costs, hardware requirements, deployment effort, support, training, integration, and replacement costs—not only the initial purchase price. | The lowest upfront price may not be the lowest-cost option across multiple countries or large workforces. | Build a three-year total-cost model covering users, devices, support, upgrades, connectivity, and localization. | Commercial terms differ by supplier, region, deployment size, and service level. |
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