| 1 | NFC standards and implementation | Ask which NFC interface and credential types the lock supports, and whether compatibility has been tested with the intended cards or phones. | NFC operates at 13.56 MHz. ISO/IEC 14443 and ISO/IEC 15693 describe different contactless card technologies; support for one does not automatically mean support for the other. | Standards and credential details help prevent mismatches between the lock, access cards, and mobile devices. |
| 2 | Credential security | Request a description of credential authentication, key storage, enrollment, revocation, and protection against replay or unauthorized duplication. | Ask for a written security architecture and test documentation. ISO/IEC 14443 compatibility alone does not establish that a credential system is secure. | Security depends on the complete credential and key-management design, not just the presence of an NFC reader. |
| 3 | Mobile-device compatibility | Confirm supported phone models, operating-system versions, enrollment steps, and whether a mobile credential requires an app, cloud service, or internet connection. | Request a compatibility matrix and hands-on tests with representative devices. Phone NFC capabilities and credential access can vary by device and operating system. | A clearly defined compatibility scope reduces deployment issues and user support requests. |
| 4 | Offline operation and access management | Check whether authorized credentials work without internet access and how access changes, lost credentials, audit events, and time settings are handled. | Ask the manufacturer to demonstrate normal use during a network outage and explain any limitations on remote management or event synchronization. | Offline behavior affects availability, security procedures, and suitability for sites with unreliable connectivity. |
| 5 | Mechanical design and door fit | Confirm door thickness, backset, handing, lock-body dimensions, cylinder or latch requirements, and compatibility with the intended door material. | Use dimensioned drawings, installation instructions, and a sample installation. For relevant products, ask about testing against applicable standards such as EN 14846 or ANSI/BHMA A156.25. | A standards reference is useful only when its scope matches the product and the target market; physical fit must also be checked. |
| 6 | Environmental durability | Review the stated operating temperature, humidity limits, corrosion resistance, and suitability for indoor or exposed outdoor installation. | Request test reports that identify the tested model and conditions. Where an ingress-protection rating is claimed, check the test basis under IEC 60529 and the rating’s intended scope. | Environmental claims should match the installation conditions; a rating or test result should not be assumed to cover every exposure. |
| 7 | Battery life and emergency access | Ask how battery-life estimates were measured, including lock activity, connectivity settings, temperature, and battery type. Check low-battery alerts and emergency access options. | Request the test method and results for the relevant configuration; compare products under the same usage assumptions rather than relying on headline estimates alone. | Usage patterns and wireless features can change battery consumption, so a stated lifetime needs context. |
| 8 | System integration and software support | Clarify available interfaces, integrations, account roles, firmware-update methods, data handling, and any recurring software or cloud fees. | Request API or integration documentation where applicable, a description of update procedures, and written terms covering service availability and data retention. | Long-term operating costs and integration limits may affect the total cost of ownership. |
| 9 | Quality control and production consistency | Review incoming-part inspection, production traceability, end-of-line testing, defect handling, and change-control procedures. | Request a sample inspection plan, test checklist, and applicable quality-system documentation; verify the scope and validity of any certificates provided. | Documented controls help assess whether production units are consistently checked against the approved specifications. |
| 10 | Compliance, warranty, and after-sales support | Identify the destination-market requirements, available product documentation, warranty coverage, spare-part availability, response process, and support languages. | Request market-specific declarations or test reports where applicable, plus written warranty and service terms. Confirm that documents match the exact model and configuration. | Requirements vary by market and product configuration; clear documentation and service terms support procurement and maintenance planning. |