Question matrix for IT -projects

For each IT -project success, it is essential that every important questions have been asked and answered before or during the planning. I promptly collected evolving question matrix to help me to build questions and check if they have already been covered. Hopefully you can benefit from it too ;.) Any feedback is appreciated.

	What	How	When	Who	Where	Why
Benefits
ROI
Schedule
Funding
Business process
Scope
Responsibility
Risk
Planning
Security
Effect
Reuse
Change management
Project management
Tracking
Partner management
Infrastructure
Implementation
Vendor management / selection
Testing
Deployments / release management
Application Management
Documentation
Education
Marketing

For example: What benefits do we get? How do we get those benefits? Who will benefit from these new functionalities? When do we expect these benefits to become reality? Where will these new functionalities be taken in place? Why should we market these new functionalities internally? . . .