Is the new project dependent on the successful delivery of a current project? if true, which analysis should be done before starting the project?

You have to have the business case and part of it is the financial analys.

As the name implies, a feasibility study is an analysis of the viability of an idea. The feasibility study focuses on helping answer the essential question of “should we proceed with the proposed project idea?” All activities of the study are directed toward helping answer this question.

Feasibility studies can be used in many ways but primarily focus on proposed business ventures. Farmers and others with a business idea should conduct a feasibility study to determine the viability of their idea before proceeding with the development of a business. Determining early that a business idea will not work saves time, money and heartache later.

We should use a business analysis tools to generate a business case for the project before initiate it.

Yes, it is . Risk analysis should be done before starting the project.

The new project

Should be based on the results the current project

And try to avoid mistakes and improve the performance of the beginning

In the new project

Must conduct a technical and financial analysis of the project before the start

There are many good answers ... I have voted for the answers I think are best suited for the task

I agree with the elegant answers by our friends so far.

MR Tartir Ayoub give the exact answer for your question ....... thanks

Yes! I agree with above answers and want to include that lesson learnt should be consult from the previous projects even from unsuccessful project.

Thanks for invitation, and I am really sorry for my late, because I were  had a lot of work.