@Shaik Luqmanehaqeem create Application Overview Document in pega via Application->Tools->Document. See if this helps. 

@Shaik Luqmanehaqeem You can write a program to fetch all statuses for each case type. First, list all the case types in your system. Then, for each case type, retrieve its associated stages. Next, for every stage, collect the statuses available. Use database queries or API calls based on where your data is stored. If you use a database, join tables that hold case types, stages, and statuses. If you use an API, loop through the endpoints to get each piece of information. Finally, combine the data so each case type maps to its stages and each stage lists its statuses.