Error Handling for a custom work flow

Hi all

I am doing some integration in which I need error/status handling. I have multiple statuses for example task a is done successfully or not, similarly for task b. In my status there are multiple sub statuses. How can I able to tell user about these statuses? I make custom workflow and make button for each task.

I am thinking that I make new entity and insert all statuses in that entity. Make a new button with my tasks buttons for error/status handling and call this new entity on this button and show statuses to the user. Am I doing right or suggest me something else. Please to solve this issue.

Thank You