I just started getting into touch with the Kanban and kanban theories. Kanban (thanks to our orthography at the beginning of a sentence I can express both with one time mentioning) is in my eyes a little bit like the old school darkroom process of developing pictures. You start by taking pictures to the film which is a kind of backlog, a lot of ideas manfested in a user story. The better a photograph you are the better is your planning a glimse of the outcoming picture. But think of the undeveloped film as a bunch of ideas, they may evaporate if not fixed in due time. These are the stories written and sometimes you can go back to them sometimes they are events never to happen again. Now when you start processing you create the negatives and these are the written user stories, tasks or whatever. Here a lot can be done wrong and a lot can be mafe right. But you will not see it right now clearly, you have to have a great gift of imagination and inspiring this image to others. You may fix the negatives or make the pictures whenever you like. You do not have to develop the pictures right away after shooting, except you work for a news magazine ;) Once you start the developement process everything runs. And the typical whiteboard becomes here a desk with the exposure unit and the basins full of chemicals. Once started a concentrated process gets started and constant flow with a very limited amount of kanbans (photo paper sheets with started developement by exposure) represent the work in process. Very early you see the results in this laboratory environment and you still have its limitations. You can view the results, redo them, improve them, test them to a certain point within your process chain. And isn't it a little bit like the waterfall model. Those little pools of different aspects of work. In the end you deploy the, well you show them, give them into reproduction or show them in a vernissage. You still can use this feedback, go back to your laboratory and make better pictures of your negatives. Or even step back to take new ones and let a fresh light show into your work.