Gbadamosi Safiu Abiodun,Maliki D.2025-04-252017-06-13Gbadamosi, S.A. and Maliki, D., 2017, June. Evaluation of Speech Quality Based on QoS Key Performance Index (KPI): A Survey. International Engineering Conference (IEC 2017), Pp.200-206http://repository.futminna.edu.ng:4000/handle/123456789/969This paper present a survey of different techniques of KPI data collection methods that are used to reduce impairment as its affect speech and the KPI are classified according to their operational modeThe utmost contest between cellular operators have left the customers highly selective with the quality of speech based on the quality of service (QoS) experienced. In order to quantitatively and qualify the network performance based on speech quality, different key performance indicators (KPI) used, are classified to aid data collection independently of the cellular providers. In this paper, a survey of different techniques of KPI data collection methods that are used to reduce impairment as its affect speech are discussed and classified according to their operational mode. It provides a detailed report about the perceptuality of speech quality and its statistical expectation of the network. Each of these techniques has its advantages and disadvantages as applied to underscore the network performance from a user’s point of view. These techniques evaluate degradation caused by various impairments in cellular networks. It is our hope that, if user get hold of these applications, it will go a long way to keep cellular operators on their toes.enKey performance Indicator (KPI)Quality of Service (QoS)Speech qualityTechniquesOther