AWS Prescriptive Guidance: Portfolio Discovery Guide
This is official Amazon Web Services (AWS) Prescriptive Guidance documentation that describes the portfolio discovery and analysis workstream, which defines the approach for defining, collecting, and analyzing the data required to create a cloud migration plan. This workstream helps you estimate the level of effort and costs associated with migrating your portfolio of applications, as well as the estimated annual run rates for compute and storage resources on AWS. The content is offered here as a free Kindle book, or you can read it online or in PDF format; see https://docs.aws.amazon.com/prescriptive-guidance/latest/migration-portfolio-discovery/.