The three pillars define Personas and Channels, as Personas represent the access roles and privileges that are required in the Microjourney"*, and the channels represent the technology that the personas use to interact with the application.

The three pillars define Cases and strategies, as cases define how to process the data, and strategy is about design pattern to design case that processes the Microjourney

The three pillars define the Data and Interface, as Data objects replace case objects in the process of the Microjourney, and an interface is about the technology used to interact with the application.

The three pillars define the Data and Interface, as a Data object is required in the process of the Microjourney, and an interface is required for integration with external systems.

The three pillars define the Cases and Strategies, as cases define how to process the Microjourney, and strategy is about design pattern to process the Microjourney

The three pillars define Personas and Channels, as Personas represent the people that are involved in the Microjourney, and the channels represent how personas interact with the application.