In the world of project management, it includes: 1- High level planning 2- Preliminary budget What is it?

Both of these activities happens at the initation phase of the project. I believe these two activities happened when developing the project business case.

Preliminary Budget is one outcome of the High Level Planning which is carried out during the Initiation Phase after the Project Charter is awarded to the Project Manager.

High Level Planning also consists of :

1) High Level Statement of Work

2) Estimated Time of Project Completion.

3) High Level Risks and Risk Management Strategies.

4) Identification of Stakeholders.

Preliminary Budget only helps to have a rough estimate of the cost of the project and helps the sponsor in committing the same before advancing to Planning Stage in which the Final Budget is worked upon and incorporated in the Project Management Plan.   

High Level Planning - The purpose of Project Planning (High Level) is to begin to define the overall parameters of a project and to establish the appropriate project management and quality environment required to complete the project. The major deliverable for this process is the Project Initiation Plan.Prelimanary Budget - Depending on the type of project and the organization's methods of operating, a prelimanary budget may be estimagted. Since there is only very general understanding of the project at this point the budget will also be approxumate.

High level planning and Preliminary budget could happens before winning the contract. They could be elements of RFQ or RFP.

Responding to customers' Request For Information (RFI).

Project Charter as stated by a previous member!

Project Charter