In the Middle Age we needed to thumb through huge binders located in a room close to the mainframe. Tedious. Then we could buy the books. We still needed to th

In the Middle Age we needed to thumb through huge binders located in a room close to the mainframe. Tedious. Then we could buy the books. We still needed to thumb through and it took time. The the wastage of engineering hours was decreased by putting the writing to low level engineers. That was a good idea as it saved money. That idea could be made even better by having documentation moved to another location by even lower paid staff. Great financial results! In the meanwhile we got patterns and realized that all software is created the same. Documentation can be recycled and continuous releasing saves time for unneeded reviews. Software and its documentation is really just assembling blocks. Learning from the leader in that space, Ikea's manuals yielded even greater results. And with additional ingenuity video was introduced. Saves trees, Ikea could learn from us. These days one does not need to read much anymore, just google a video. And if a problem can't be solved, then agility comes to rescue. Lean development means problems are solved when needed and that is what agile users are for.