The systems analysis phase includes four main activities. These include requirements modeling, data and process modeling, consideration of development strategies and which of the following?

The systems analysis phase focuses on understanding and detailing the requirements and functionalities of the system being developed. Among the activities involved, requirements modeling is crucial as it helps define what the system should accomplish, while data and process modeling provides a visual representation of the data flows and processes involved.

Considering development strategies allows analysts to plan how to build the system effectively. Object modeling, which is selected as the answer, is also a fundamental part of this phase. It involves creating representations of the system’s entities and their relationships, often using methods such as Unified Modeling Language (UML) to visualize and design the system architecture based on real-world objects or concepts. By using object modeling, analysts can gather more insights into how the different components of the system interact and ensure that all necessary requirements are captured before moving forward.

In contrast, testing, implementation, and user training are crucial stages that occur after the systems analysis phase, not during it. Testing validates the system's performance against requirements, implementation involves deploying the developed system, and user training helps end-users understand and effectively use the system. Hence, while these activities are important in the overall project lifecycle, they belong to different phases of system development and do not represent the core activities of the systems analysis phase.