The book is focused for software development teams. It's a great book that even if you aren't writing software, it provides real, practical things you can implement in your team to practice Agile better.

I'm not sure. I've never used or heard of any voting options out of the box. Maybe through a plugin?

Sure, I have a couple on my reading list. Currently, that's the best one I've read that I would personally recommend.

Are you looking for something like a count? Out of the box, I don't think you can do anything like that. You could use issuekey in portfolioChildIssuesOf("INIT-001") where INIT-001 is your story. That would return all the subtasks in a search which technically would give you a count, . .

Thanks a million for replying...yes because in my case the team wants to show business the numbers of Subtasks they are working on, I wanted to show kanban at story level but also if I click on swimlanes it should be like at assignee----Story__Subtask

Thanks?