[smashedtoatoms]

This article is the what, but it is missing the why. I'm supremely biased against scrum, so basically ignore what I am saying if you're a fan of it. Fundamentally, Kanban is pull-based, and Scrum is push-based. That's the difference.

Scrum spends time determining how long things will take, and then attempts push it into a schedule via story pointing and other ceremony where people pretend they're not guessing how long thing will take by using points and t-shirt sizes and anything other than time to guess how much they can get done in some arbitrary amount of time. Then devs do what they were going to do anyway, and everyone slaps each other on the back because they're measuring the success they're having. It's a dream for people who like to count things and build check lists and check them off. Its success has little to do with the process and much to do with the team's ability to gather requirements and do their job. It's ideal for contract gigs where it's as important to track how much time it takes you to do things as it is to actually do things.

In Kanban you put what you want to do in a list, and pull the things from the list in order as you complete them. If customers need things quicker, you change the order of things in the list while communicating to them what will slip and what will accelerate. They take as long as they take (because that's how the world works, yes, even in scrum), but with 100% less ceremony and pointless coordination. Kanban is about constantly managing constraints and eliminating waste. You don't need to strictly measure how long things are taking. You pay attention when things don't move off the board, and modify resourcing in whatever way will get things unstuck. It's less fun because you don't get to pretend you know how long something will take, but it's more fun because you get to be an adult professional instead of a servant to the processes of people who don't actually build things.

This is somewhat tongue-in-cheek, but in my career I've never seen switching to pull-based patterns make things worse, and I've often seen them make things better, including morale. It doesn't seem like it will work, but in practice there are so many efficiencies gained in pull-based processes that it usually ends up being faster and feeling better while doing it.