The situation we are currently experiencing, such as the health crisis, by COVID-19 has generated an increase in online purchases; factors such as the Quality of Electronic Service (e-SQ) are considered determining in this process since it allows us to evaluate and know the perception of consumers. The purpose of this article is to classify the knowledge generated about e-SQ and the diverse contexts in which it has been studied. For the review process, the Kitchenham and Charters method is used, with which diverse definitions and applications of service quality were obtained, and although there is no single concept that is accepted by the scientific community, it has been adapted by diverse authors. In the review, it was found as part of the results that five of the dimensions of quality of service had greater impact and relevance, which have been used in various contexts, leading to the creation of other models. Finally, a model is proposed for Mexico that starts from the five dimensions that had greatest impact and relevance in the studies for the consumer, which are Efficiency, Privacy, Compliance, Responsiveness and Contact; a dimension is added to the model that is "guaranty" considering some factors of the geographical area. This model could present important contributions for the measurement of service quality in a new context such as Mexico.

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Electronic Service Quality (e-SQ) is a topic that has been reviewed by several authors and, given the situation we live in, has become more relevant in the world; therefore, it is of vital importance to generate an effective measurement of the service being provided, which will allow companies to know the needs and expectations of their customers and how they evaluate the service received. This article considers an exploratory-descriptive research, which through a systematic literature mapping (MSL) reviews the methods and techniques that have been applied for the validity of the scales derived from e-SQ, thus generating a focused view of the methods applied in scientific research in the last five years. With the results obtained, a theoretical model for validating a scale is generated and proposed, which could be useful for researchers seeking to confirm and validate their scales or who are in the process of developing a research project.

The multivariate technique of partial least squares structural equations (PLS-SEM) considered as second generation, has become more relevant in its application in recent years in various investigations, so this article considers an descriptive research, the which presents some properties characteristic of said technique and through the application of data and values obtained from a case study shows the phases required to validate and evaluate a model with the PLS-SEM technique. With the results obtained, a theoretical model is generated and proposed that could be useful for researchers who starting in the use and application of this technique.

The purpose of this article is to classify knowledge of the state of the art about intelligent cities and their various perspectives in which it has been discussed; a qualitative methodology is employed in the review process for the analysis of terms. Several definitions, dimensions and applications of the elements that integrate an intelligent city were located, being the common one in all intelligent cities the presence of the technologies of the information and communication, although it is a not unified concept similar characteristics were detected that look for to improve the quality of life of its inhabitants and the optimization of the resources that are in the city. The results obtained from the literary review show that intelligent cities are based on a model with different dimensions according to the conditions of the same, the implementation of such models tend in the future to generate characteristics such as social openness, stable economy, low unemployment rates, promote equality among citizens. Finally a model is proposed that arises from the literary revision, this model includes aspects like; Economy, environment, intelligent government, people and mobility as dimensions that can improve the quality of life of its inhabitants.