Below I put the PLA link for IAAS. I hope it help you!
In a joint effort between Microsoft product development and Microsoft Services, the Infrastructure-as-a-Service (IaaS) Product
Line Architecture (PLA) has been created to help organizations develop and implement private cloud infrastructures quickly while reducing complexity and risk. The IaaS PLA utilizes the core capabilities of the Windows Server operating system, Hyper-V, and System Center to deliver a private cloud infrastructure for customers.
The IaaS PLA provides a reference implementation that combines Microsoft software, consolidated guidance, and validated configurations with partner technology such as compute, network, and storage architectures, in addition to value-added software components through a series of defined fabric infrastructure and fabric management design patterns. The PLA includes multiple fabric design patterns and storage architectures as well as a single highly available System Center designpattern.
These patterns serve as the foundation for a range of private and hybrid cloud solutions and offerings from Microsoft Services and its partners. By implementing private cloud configurations that align to the IaaS PLA, Microsoft and its hardware partners can help provide organizations the control and the flexibility that are required to reap the potential benefits of the private cloud.
At this time, there are two documents available to you – the Fabric Architecture Guide and the Fabric Management Architecture Guide