Level of Use and Satisfaction of E-Commerce Customers in Covid-19 Pandemic Period: An Information System Success Model (ISSM) Approach

Pandemic outbreaks of COVID-19 have made customers take drastic steps to help world governments to prevent further spread, one of which is by social distancing. This policy made buying and selling online a convenient option to fulfill the needs for goods and/or services. The purpose of this study was to determine the level of use and satisfaction of e-commerce customers in the COVID-19 pandemic period with the information system success model (ISSM) approach that was formed through system quality, information quality, and service quality. The research method used a quantitative approach by distributing questionnaires to respondents of 206 ecommerce costumers. Data analysis used Structural Equation Modeling (SEM) where the results confirm that system quality, information quality, service quality, affected the level of use and user satisfaction of e-commerce customers. E-commerce companies are recommended to maintain, even improve system quality and information quality because information that is less interesting, less relevant, and difficult to understand results in low information quality, which in turn, can reduce the level of use and customer satisfaction. © 2020 Tim Pengembang Jurnal UPI Article History: Received 16 Apr 2020 Revised 03 May 2020 Accepted 05 May 2020 Available online 11 May 2020 ____________________


INTRODUCTION
Electronic commerce (e-commerce) is growing in popularity in the world economy. It began in 1995 when the need for digital goods was needed to maintain company transactions. Digital goods are things that can be sent via digital networks (Laudon & Laudon, 2015). E-commerce is sales made through electronic media. E-commerce is also one type of electronic business mechanism that focuses on individual-based business transactions using the Internet as a medium for exchanging goods or services (Surawiguna, 2010). E-commerce brings big business opportunities such as product sales and online service provision and revenue growth (Rohm & Swaminathan, 2004) especially for companies such as e-retailers because of their easy and interactive nature, lower costs, high customization and personalization for customers (Santos-Vijande et al., 2013).
E-commerce has become one of the important strategies in business today, because e-commerce can increase the level of efficiency in company operations. The types of e-commerce based on the type of relationship consist of (Abdu'a & Wasiyanti, 2019): (a) Business to Business (B2B), a type of inter-company transaction to other companies. For instance, a distributor gets their goods from a manufacturer. Prices that occur are often adjusted to the number of orders and negotiations; (b) Business to Consumer (B2C). Transactions that occur are usually directed to end consumers, where the seller can be a distributor, as a producer or as a retailer.  (19), occurring in Wuhan, has had a major impact not only in the health sector, but also on the economy, including economic activities related to the process of purchasing goods or services. The condition of the corona pandemic COVID-19 followed by the implementation of social distancing led to new consumer behavior in determining purchasing patterns (https://nasional.kompas.com/read/2020/04/25/154 72271/update-25-april-kasus-covid -19-di-indonesiamencapai-8607). Consumers are now using online tools and are increasingly looking for online channels to research and buy the products or services they need (Dirgantari et al., 2019). This also makes competition between ecommerce companies more stringent.
The outbreak of Covid-19 in Indonesia has made online shopping the choice of many parties to obtain goods as shown in Table 1 where there has been an increase in the number of visits to various marketplaces in Indonesia.
Based on the commercial data in Indonesia, the total estimated E-Commerce transactions during the Covid-19 pandemic reached a peak after the announcement of the Large-scale Social Limitation (PSBB) policy on March 31, 2020, which was 670,755 transactions. Total estimated sales during this period were quite high at Rp 12.3 billion. This e-commerce activity takes place using a variety of platforms as shown in Figure 1 where Indonesia has the highest level of e-commerce usage among countries in the world, with 90% of the country's Internet users aged between 16 and 64 who report that they have purchased products and services online as reported by GlobalWebIndex (Kemp & Moey, 2019).
E-commerce companies should increase customer satisfaction to maintain and even increase online buying and selling transactions. In the context of e-commerce, customer satisfaction is usually defined as comparing from other e-commerce compa-nies that cause customer re-purchases. Customer satisfaction can be defined as a favorable customer attitude towards ecommerce that results in consumers making repeat purchases (Goid et al., 2011). Kotler and Keller (2016) argue that satisfaction is the level of feeling in which someone states the results of a comparison of the performance of products or services received and expected after making a purchase or use. Consumer satisfaction, according to Kotler and Keller (2016), is a feeling of pleasure or disappointment someone who comes from a comparison between his impression of the results of a product with expectations. Customer expectations are believed to have a large role in determining satisfaction (Meidita et al., 2016 Customer expectations are customer beliefs before trying or buying a product used as a standard or reference in choosing the product's performance. One factor in winning thse competition can be seen from the number of customers who use the products or services offered by the company (Zeithaml et al., 1993). The increasing level of satisfaction will increase the tendency of consumers to repurchase products offered by the company. If consumers have felt satisfied, it will create a good cooperative relationship between consumers and companies (Buttle & Maklan, 2019).
One key to success of e-commerce is information systems. The success of ecommerce must be balanced with a good information system because without it, there will be no transactions (Abdu'a & Wasiyanti, 2019). The information technology system success model is one with a good information system using sophisticated technology, complete but simple. Information system success is designed simply to review the use of information systems (Widiaty et al., 2020). Thus, the benchmarks of information system success can be viewed from a simple model but are considered valid (Hartono et al., 2010).
Since its publication in 1992, nearly 300 articles in journals refer to the use of DeLone and McLean (2003) as a successful model as a basis for measuring variables related to information systems (IS). This model is based on Shannon and Weaver's classic communication theory adjusted by Mason to measure impact. As a strong communication and trade intermediary, the Internet is a communication and phenomenon that encompasses itself into a measurement framework (for example, DeLone and McLean model) that is built based on communication theory. In the context of ecommerce, the main system users are customers or suppliers rather than internal users. Customers and suppliers will use the system to buy or sell and carry out business transactions. These electronic decisions and transactions can affect each individual user, organization, industry and even the national economy. There are six variables that affect the quality of e-commerce systems based on the Information System Success Model (ISSM) from DeLone and McLean, namely (Angelina et al., 2019): (1) information quality, (2) service quality, (3) usage, (4) customer satisfaction, (5) internet benefits. In this study, the measurement is limited to measuring customer satisfaction.
The use of information system technology has proven to be able to reduce costs, create faster and more efficient work processes, and offer a high degree of flexibility. Delone and Mclane model updates have been widely used, including using the modified Delone and Mclane model to measure the success of e-learning systems at universities. It is also used to evaluate the success of information systems management projects, and can be useful for decision making in organizations in evaluating the implementation of information systems (Gu & Jung, 2013).
Thus, the purpose of this study was to determine the level of use and satisfaction of ecommerce customers during the Covid-19 pandemic by using the information system success model (ISSM) approach formed through system quality, information quality, and service quality.

METHODS
This research used a quantitative method with data obtained from the respondents' direct responses through questionnaires to explore more specific information about the description of the level of usage and e-commerce customer satisfaction in the Covid-19 pandemic period with the Information System Success Model (ISSM) approach through System Quality p-ISSN 2528-1410 | DOI: https://doi.org/10.17509/ijost.v5i2.24617| e-ISSN 2527-8045 (SQ), Information Quality (IQ), Service Quality (SerQual) and Use (U).
The dimensions used for System Quality (SQ) are adaptability, availability, reliability, response time and usability. Dimensions of Information Quality (IQ) include completeness, ease of understanding, personalization, relevance and security. The Service Quality (SerQual) dimension is assurance, empathy and responsiveness. Dimensions of Use (U) include nature of use, navigation patterns, number of site visits and number of transactions executed, and dimensions for User Satisfaction (US) are repeat purchases, repeat visits and user surveys (Delone & Mclean, 2003).
The data analysis technique used is Structural Equation Modeling (SEM) where there are basic assumptions that need to be met, one of them regarding sample size. The sample size for SEM models with the number of latent variables (constructs) up to 5 and each construct is explained by several indicators, the sample size of 100-150 respondents has been considered adequate (Saputro et al., 2015), while Ghozali (2014) suggested the SEM sample size between 100 to 200 respondents. Large sample sizes are very critical to get the right parameter estimates. Then the number of samples in this study was determined by 200 Shopee customers because Shopee is ranked first in the top five e-commerce sites in Indonesia (https://iprice.co.id/insights/mapofecommerce/). This research used a Likert scale with a range of strongly disagree (score 1) to strongly agree (score 5) and uses purposive sampling method. The survey was conducted for 2 months on e-commerce shopee customers during March-April 2020.
The research model are shown in Figure  2,

RESULTS AND DISCUSSION
After the data were processed, 206 valid respondents were obtained. Demographic characteristics as shown in the Table 2 shows 62.14% of respondents were female and 37.86% are male, while the majority of the age group of respondents were the age group of 20-24 years by 88%. The majority of respondents had more than 5 times online shopping experience.
To determine the internal reliability of the variables used in the model, Cronbach's alpha for responses taken. The results as shown in Table 3 indicate that Cronbach's alpha value for all variables are more than 0.8 which mean all variables are reliable. The results show that the research model was good, as shown by model fit indices in Table 4.
To test the hypotheses and structural models, confirmatory factor analysis is used for evaluate the significance and strength of the path. The results are shown in Figure 3 and Table 5. The path coefficient shows that of the 7 relationships tested, all are significant, which means that the system quality, information quality, service quality, significantly affected the use and user satisfaction.
As seen in Table 5, H1, that is, System Quality affects Use shows that system quality can increase use and this result is in accordance with the study conducted by Veranika and Murtini (2017) that in as-sessing the use variable, system quality still has opportunities in implementing the system. The system quality implementation aims to develop the system in increasing use. Developers can improve Shopee's system quality as a criteria expected by users so that the level of use continues to increase in the future, whereas H2, which is the Effect of System Quality on User Satisfaction, shows that system quality can increase user satisfaction. This is consistent with research conducted by Sultono et al. (2016) which needs to be evaluated periodically by the management of system quality by involving users, in order to ensure that user needs are met so that user satisfaction is achieved.    The result of H3, which is the Effect of Information Quality on Use, shows that information quality can increase use. In this research, information quality has a positive effect on use. However, based on research conducted by Rahayu et al. (2018) states that information quality does not have a significant effect on use. Unattractive presentation of information, inaccurate information relevance, and language that is not easily understood result in a lack of information quality.
The effect of Information Quality on User Satisfaction (H4) shows that information quality can increase user satisfaction. This is in accordance with the research conducted by Wibowo (2013), that information quality has the most dominant influence on user satisfaction because information quality relating to the delivery of information about the stages that must be passed by the user is clearly conveyed (with pictures that make it easy for users to digest each well stages). Whereas H5, which is the Effect of Service Quality on Use, shows that service quality can increase use. Research conducted by Kallweit et al. (2014) explains that their research on the effects of service quality mediation in technology implementation models found that service quality is part of mediating effects on attitudes or intentions to use a service or product. Therefore, retailers must emphasize service quality related to use.
Hypothesis six results (H6) Effect of Service Quality on User Satisfaction shows service quality can increase user satisfaction. In a study conducted by Susnita (2020), service quality has a positive and significant effect on user satisfaction. While the research conducted by Mulyapradana et al. (2020) shows that service quality does not have a significant effect on user satisfaction because items from service quality that have a p-ISSN 2528-1410 | DOI: https://doi.org/10.17509/ijost.v5i2.24617| e-ISSN 2527-8045 significant effect are only responsiveness items. While Hypothesis seven (H7) Effect of Use on User Satisfaction shows system quality can increase user satisfaction. This is in accordance with research conducted by Dwivedi et al. (2013) which explains that from this study factors such as system quality and use affect consumer attitudes positively so that they are related to user satisfaction.

CONCLUSION
Overall, the use of the information system success model (ISSM) approach formed through system quality, information quality, service quality has proven to affect the level of usage and ecommerce consumer satisfaction, especially in the current co-19 pandemic. The ecommerce company must continue to improve the system quality as the criteria expected by the user so that the level of its use will increase in the future and still maintain and even improve information quality because of the presentation of information that is less attractive, the relevance of information that is less precise, and language that is not easily understood is a deficiency from the quality of information which can reduce the level of use and customer satisfaction.

ACKNOWLEDGEMENTS
The researchers would like to offer gratitude to Universitas Pendidikan Indonesia for supporting this research.

AUTHORS' NOTE
The author(s) declare(s) that there is no conflict of interest regarding the publication of this article. The authors also confirm that the data and the paper are free of plagiarism.