Introduction to the Windows Assessment and Deployment Kit
http://www.microsoft.com/download/en/details.aspx?id=27410

Windows Assessment and Deployment Kit Release Notes & Windows Assessment Services User's Guide
http://www.microsoft.com/download/en/details.aspx?id=27409

About the Windows Assessment and Deployment Kit
http://msdn.microsoft.com/library/windows/hardware/br259106

Tool:
    Description

Deployment Tools:
    Tools to customize Windows images and to automate installation and image management.

    Includes Deployment Imaging Servicing and Management tool (DISM), Windows System Image Manager (Windows SIM), Windows Help & Support customization tools, and User State Migration Tool (USMT).

Assessment Toolkit:
    Tools to measure and optimize aspects of quality and performance of a computer. Includes Assessments, Windows Assessment Console (Windows AC) and Windows Assessment Services (Windows AS).

Windows Performance Toolkit:
    Tools to analyze system and application performance. Includes Windows Performance Analyzer and Windows Performance Recorder.

Application Compatibility Toolkit:
    Enables IT professionals to evaluate and mitigate application compatibility issues before deploying a new version of Windows or a new version of Internet Explorer.

Volume Activation Management Tool:
    IT Professional tool that automates and manages the activation of Windows, Windows Server, and Office 2010. For more information