I'm a new scrum master for a team that is using story point estimation and hours. We do story points first during grooming and then hours during planning.
I always thought of story points as being primarily for the project manager, and hours being for the engineers (this was simply the way we had been doing things). A coworker and fellow engineer asked why we are using both.
While I read articles such as: Don’t Equate Story Points to Hours, which explains why you shouldn't use story points to hours even though they are related Or Is there any published research about story points vs time estimation? which explain that story points are more accurate for estimation.
I fail to see much written about using both of them. We estimate stories by story points which gives us a broad sense, and then we drill down how long each task will be and use the story points and hours to give ourselves an estimate. I'm beginning to wonder however if my coworker is on to something.
Is using Story Points and hours a thing? Is there any advice for or against it? I recognize it probably takes an additional 2 hours to do both (multiplied by every member of the team) and it costs a lot.
Why use both? Anyone have any experiences with this?