Archimate

ArchiMate is an open and widely adopted industry-standard language designed and used for enterprise architecture modeling. It is functional and a narrative tool that can represent and explores the complex structures among organizations.  ArchiMate is known to be a well-accepted approach in architecture modeling and documenting where it is an indispensable tool for the ones who are looking for order and consistency in their messy systems.

Business Layer for McKesson:

This layer should be devoted to business view aspects pertinent to McKesson. For instance electronic health records, interactions between healthcare professionals and administrative staff, the types of services provided, and their stakeholders' interactions are all included.

Application Layer for McKesson:

For McKesson, the Application Layer would be the creating of software applications such as ERP and the IT systems (Information Technology systems) that support their health care services. This application covers various spheres of healthcare, such as medical records management, logistics, supply chain control and communications that allow to effectively carry out healthcare operations. ((Services Recent News | Light Reading, n.d.)

Technology Layer for McKesson:

The Technology Layer for McKesson would converge on the technological structure supporting their applications. This encompasses simulating the servers, networks, databases, and other technological bits and bytes that maintain the smooth running of the IT infrastructure in the healthcare setting.