Draft:Quality of Install

Quality of Install (QoIa measure of the performance of a service at the time of installation or service activation, used by internet service providers for home Wi-Fi networking. QoI extends quality of service (QoS) metrics by including the effect of Wi-Fi wireless coverage, which may vary throughout a home.

Definition and concepts
QoS metrics such as throughput and latency are used by internet service providers to assess performance against service level agreements, monitor network health, and predict customer satisfaction. Historically this information has been collected by customer-premises equipment (CPE) located at the service demarcation point.

QoI is the aggregation of QoS metrics collected at multiple locations throughout a home, at the time of installation. QoI takes into account the effect of home Wi-Fi performance, which varies based on wireless access point placement, signal loss due to building materials and room clutter, and wireless interference from other sources operating in the same frequency band. Wi-Fi is an OSI layer 1 (physical) and layer 2 (data link) protocol, so performance impacts at these lower layers are reflected in QoS indicators, which are predominantly IP packet-based (layer 3, network) metrics. Alternatively, QoI is a measure of end-to-end service performance with multiple endpoints inside a user's home.

QoI metrics present a snapshot of ISP and home Wi-Fi network performance, at the time of installation. As an installation KPI, QoI is related to quality of experience (QoE), which focuses the user's perceived quality of a service. The use of QoI metrics by installers and technicians allows for optimization of Wi-Fi coverage according to user requirements regarding applications, smart home devices, usage patterns, and important locations. This data sets the benchmark for network performance post-installation and can be used for technical support purposes.