Understanding Management vs. Leadership Development Programs: How Do I Start Designing for Top Management?

I want to know what is the difference between Management Development Programs and Leadership Development Programs. Secondly, I got a project to design a Leadership Development Program for top management. I don't know how to start. What should be my main focus? How to do TNA and then how to jump on DNA (Development Need Assessment)? Can anyone guide me?

Management development programs are offered by different business schools to middle-level managers of various companies. These programs include an annual training calendar that is rolled out, and organizations select the required programs to send their employees to attend.