Hybrid Data Models for Industrial Internet of Things (IIoT) Analytics
The Industrial Internet of Things (IIoT) has ushered in a new era of connected devices, real-time data collection, and intelligent analytics. However, the complexity and heterogeneity of IIoT environments demand sophisticated data modeling techniques to harness the full potential of analytics. Hybrid data models—integrating structured, semi-structured, and unstructured data representations—are emerging as a critical solution. This paper presents a comprehensive study on the design and application of hybrid data models tailored for IIoT analytics. It explores data heterogeneity challenges, presents layered data model architectures, and discusses the integration of relational, NoSQL, and time-series databases. A proposed hybrid data model architecture is introduced, with a focus on real-time processing, scalability, and semantic interoperability. The model is validated using an industrial case study involving predictive maintenance in a smart factory. Results indicate a significant improvement in data query performance, storage efficiency, and analytical accuracy compared to traditional single-model approaches. Flowcharts and diagrams illustrate data flow, architectural layers, and analytics pipelines. The paper concludes by emphasizing the role of hybrid data models as enablers for scalable, resilient, and intelligent IIoT ecosystems.