Which of the following best describes a 'process instance'?

A 'process instance' refers to a specific execution of a process model. Each time a process model is initiated, a new instance of that process is created, allowing for the handling of individual cases or tasks according to the defined steps in the process. This means that while a process model provides a blueprint or framework for how tasks should be executed, the process instance represents the active execution of those tasks with its own unique data, state, and history.

In this context, the other options do not accurately describe a process instance. While a template for process configuration refers to the design aspect of a process, it does not capture the dynamic nature of a process instance. Similarly, a visual representation of a workflow describes the graphical depiction of processes but doesn't pertain to actual instances of execution. Lastly, a stored record of process results may involve the outcomes or logs from completed instances but does not encapsulate the active execution itself. Thus, option A is the most precise and relevant definition of a process instance in this context.