Figure 1.
The workflow is divided into Assembling, Arranging, and Assessing. Assembling includes Identification and Acquisition. Identification defines the domain as service quality in halal industries. It lists three research questions on publication trends, key factors, and research opportunities. It specifies empirical review-based English journal articles from Web of Science. Acquisition uses Web of Science with an open start date and an end date of 2024. Search keywords include halal, Muslim asterisk, Islam asterisk, and service quality in the abstract. The initial search returns 122 articles. Arranging includes Organization and Purification. Organization uses theories, contexts, characteristics, and methods as organisational codes under the T C C M framework. Purification excludes 0 duplicates and 44 articles outside the study scope. It retains 78 empirical review-based English journal articles featuring service quality as an underpinning theory in halal industries. Assessing includes Evaluation and Reporting. Evaluation uses bibliometric and content analysis and proposes future research directions based on identified gaps. Reporting uses figures, tables, and words. The stated limitation is English-language journal articles in Web of Science. No funding is reported.Flow diagram of SLR using SPAR-4-SLR protocol